diff --git a/rsconcept/backend/apps/rsform/permissions.py b/rsconcept/backend/apps/rsform/permissions.py
new file mode 100644
index 00000000..874fca17
--- /dev/null
+++ b/rsconcept/backend/apps/rsform/permissions.py
@@ -0,0 +1,77 @@
+''' Custom Permission classes.
+    Hierarchy: Anonymous -> User -> Editor -> Owner -> Admin
+'''
+from typing import Any, cast
+
+from django.core.exceptions import PermissionDenied
+from rest_framework.permissions import AllowAny as Anyone  # pylint: disable=unused-import
+from rest_framework.permissions import BasePermission as _Base
+from rest_framework.permissions import \
+    IsAuthenticated as GlobalUser  # pylint: disable=unused-import
+from rest_framework.request import Request
+from rest_framework.views import APIView
+
+from . import models as m
+
+
+def _extract_item(obj: Any) -> m.LibraryItem:
+    if isinstance(obj, m.LibraryItem):
+        return obj
+    elif isinstance(obj, m.Constituenta):
+        return cast(m.LibraryItem, obj.schema)
+    elif isinstance(obj, (m.Version, m.Subscription, m.Editor)):
+        return cast(m.LibraryItem, obj.item)
+    raise PermissionDenied({
+        'message': 'Invalid type error. Please contact developers',
+        'object_id': obj.id
+    })
+
+
+class GlobalAdmin(_Base):
+    ''' Item permission: Admin or higher. '''
+
+    def has_permission(self, request: Request, view: APIView) -> bool:
+        if not hasattr(request.user, 'is_staff'):
+            return False
+        return request.user.is_staff  # type: ignore
+
+    def has_object_permission(self, request: Request, view: APIView, obj: Any) -> bool:
+        if not hasattr(request.user, 'is_staff'):
+            return False
+        return request.user.is_staff  # type: ignore
+
+
+class ItemOwner(GlobalAdmin):
+    ''' Item permission: Owner or higher. '''
+
+    def has_permission(self, request: Request, view: APIView) -> bool:
+        return not request.user.is_anonymous
+
+    def has_object_permission(self, request: Request, view: APIView, obj: Any) -> bool:
+        if request.user == _extract_item(obj).owner:
+            return True
+        return super().has_object_permission(request, view, obj)
+
+
+class ItemEditor(ItemOwner):
+    ''' Item permission: Editor or higher. '''
+
+    def has_object_permission(self, request: Request, view: APIView, obj: Any) -> bool:
+        if m.Editor.objects.filter(
+            item=_extract_item(obj),
+            editor=cast(m.User, request.user)
+        ).exists():
+            return True
+        return super().has_object_permission(request, view, obj)
+
+
+class EditorMixin(APIView):
+    ''' Editor permissions mixin for API views. '''
+
+    def get_permissions(self):
+        result = super().get_permissions()
+        if self.request.method.upper() == 'GET':
+            result.append(Anyone())
+        else:
+            result.append(ItemEditor())
+        return result
diff --git a/rsconcept/backend/apps/rsform/tests/s_views/t_library.py b/rsconcept/backend/apps/rsform/tests/s_views/t_library.py
index 794b8688..5831409d 100644
--- a/rsconcept/backend/apps/rsform/tests/s_views/t_library.py
+++ b/rsconcept/backend/apps/rsform/tests/s_views/t_library.py
@@ -1,16 +1,16 @@
 ''' Testing API: Library. '''
 from rest_framework import status
 
+from apps.rsform.models import LibraryItem, LibraryItemType, LibraryTemplate, RSForm, Subscription
 from apps.users.models import User
-from apps.rsform.models import LibraryItem, LibraryItemType, Subscription, LibraryTemplate, RSForm
 
 from ..testing_utils import response_contains
-
-from .EndpointTester import decl_endpoint, EndpointTester
+from .EndpointTester import EndpointTester, decl_endpoint
 
 
 class TestLibraryViewset(EndpointTester):
     ''' Testing Library view. '''
+
     def setUp(self):
         super().setUp()
         self.owned = LibraryItem.objects.create(
@@ -71,30 +71,6 @@ class TestLibraryViewset(EndpointTester):
         self.assertTrue(response.status_code in [status.HTTP_202_ACCEPTED, status.HTTP_204_NO_CONTENT])
 
 
-    @decl_endpoint('/api/library/{item}/claim', method='post')
-    def test_claim(self):
-        self.assertNotFound(item=self.invalid_item)
-        self.assertForbidden(item=self.owned.id)
-
-        self.owned.is_common = True
-        self.owned.save()
-        self.assertNotModified(item=self.owned.id)
-        self.assertForbidden(item=self.unowned.id)
-
-        self.assertFalse(self.user in self.unowned.subscribers())
-        self.unowned.is_common = True
-        self.unowned.save()
-
-        self.assertOK(item=self.unowned.id)
-        self.unowned.refresh_from_db()
-        self.assertEqual(self.unowned.owner, self.user)
-        self.assertEqual(self.unowned.owner, self.user)
-        self.assertTrue(self.user in self.unowned.subscribers())
-
-        self.logout()
-        self.assertForbidden(item=self.owned.id)
-
-
     @decl_endpoint('/api/library/active', method='get')
     def test_retrieve_common(self):
         response = self.execute()
@@ -132,7 +108,7 @@ class TestLibraryViewset(EndpointTester):
         self.assertEqual(response.status_code, status.HTTP_200_OK)
         self.assertFalse(response_contains(response, self.unowned))
 
-        user2 =  User.objects.create(username='UserTest2')
+        user2 = User.objects.create(username='UserTest2')
         Subscription.subscribe(user=self.user, item=self.unowned)
         Subscription.subscribe(user=user2, item=self.unowned)
         Subscription.subscribe(user=user2, item=self.owned)
@@ -183,13 +159,13 @@ class TestLibraryViewset(EndpointTester):
     def test_clone_rsform(self):
         x12 = self.schema.insert_new(
             alias='X12',
-            term_raw = 'человек',
-            term_resolved = 'человек'
+            term_raw='человек',
+            term_resolved='человек'
         )
         d2 = self.schema.insert_new(
             alias='D2',
-            term_raw = '@{X12|plur}',
-            term_resolved = 'люди'
+            term_raw='@{X12|plur}',
+            term_resolved='люди'
         )
 
         data = {'title': 'Title1337'}
diff --git a/rsconcept/backend/apps/rsform/utils.py b/rsconcept/backend/apps/rsform/utils.py
index b5e73e1f..5b3e1d80 100644
--- a/rsconcept/backend/apps/rsform/utils.py
+++ b/rsconcept/backend/apps/rsform/utils.py
@@ -4,8 +4,6 @@ import re
 from io import BytesIO
 from zipfile import ZipFile
 
-from rest_framework.permissions import BasePermission, IsAuthenticated
-
 # Name for JSON inside Exteor files archive
 EXTEOR_INNER_FILENAME = 'document.json'
 
@@ -13,48 +11,6 @@ EXTEOR_INNER_FILENAME = 'document.json'
 _REF_OLD_PATTERN = re.compile(r'@{([^0-9\-][^\}\|\{]*?)\|([^\}\|\{]*?)\|([^\}\|\{]*?)}')
 
 
-class ObjectOwnerOrAdmin(BasePermission):
-    ''' Permission for object ownership restriction '''
-
-    def has_object_permission(self, request, view, obj):
-        if request.user == obj.owner:
-            return True
-        if not hasattr(request.user, 'is_staff'):
-            return False
-        return request.user.is_staff  # type: ignore
-
-
-class IsClaimable(IsAuthenticated):
-    ''' Permission for object ownership restriction '''
-
-    def has_object_permission(self, request, view, obj):
-        if not super().has_permission(request, view):
-            return False
-        return obj.is_common
-
-
-class SchemaOwnerOrAdmin(BasePermission):
-    ''' Permission for object ownership restriction '''
-
-    def has_object_permission(self, request, view, obj):
-        if request.user == obj.schema.owner:
-            return True
-        if not hasattr(request.user, 'is_staff'):
-            return False
-        return request.user.is_staff  # type: ignore
-
-
-class ItemOwnerOrAdmin(BasePermission):
-    ''' Permission for object ownership restriction '''
-
-    def has_object_permission(self, request, view, obj):
-        if request.user == obj.item.owner:
-            return True
-        if not hasattr(request.user, 'is_staff'):
-            return False
-        return request.user.is_staff  # type: ignore
-
-
 def read_zipped_json(data, json_filename: str) -> dict:
     ''' Read JSON from zipped data '''
     with ZipFile(data, 'r') as archive:
diff --git a/rsconcept/backend/apps/rsform/views/constituents.py b/rsconcept/backend/apps/rsform/views/constituents.py
index 55c81c96..cd772f1c 100644
--- a/rsconcept/backend/apps/rsform/views/constituents.py
+++ b/rsconcept/backend/apps/rsform/views/constituents.py
@@ -1,23 +1,15 @@
 ''' Endpoints for Constituenta. '''
 from drf_spectacular.utils import extend_schema, extend_schema_view
-from rest_framework import generics, permissions
+from rest_framework import generics
 
 from .. import models as m
+from .. import permissions
 from .. import serializers as s
-from .. import utils
 
 
 @extend_schema(tags=['Constituenta'])
 @extend_schema_view()
-class ConstituentAPIView(generics.RetrieveUpdateAPIView):
+class ConstituentAPIView(generics.RetrieveUpdateAPIView, permissions.EditorMixin):
     ''' Endpoint: Get / Update Constituenta. '''
     queryset = m.Constituenta.objects.all()
     serializer_class = s.CstSerializer
-
-    def get_permissions(self):
-        result = super().get_permissions()
-        if self.request.method.upper() == 'GET':
-            result.append(permissions.AllowAny())
-        else:
-            result.append(utils.SchemaOwnerOrAdmin())
-        return result
diff --git a/rsconcept/backend/apps/rsform/views/library.py b/rsconcept/backend/apps/rsform/views/library.py
index 6a6d4136..ee610040 100644
--- a/rsconcept/backend/apps/rsform/views/library.py
+++ b/rsconcept/backend/apps/rsform/views/library.py
@@ -6,7 +6,7 @@ from django.db import transaction
 from django.db.models import Q
 from django_filters.rest_framework import DjangoFilterBackend
 from drf_spectacular.utils import extend_schema, extend_schema_view
-from rest_framework import filters, generics, permissions
+from rest_framework import filters, generics
 from rest_framework import status as c
 from rest_framework import viewsets
 from rest_framework.decorators import action
@@ -14,15 +14,15 @@ from rest_framework.request import Request
 from rest_framework.response import Response
 
 from .. import models as m
+from .. import permissions
 from .. import serializers as s
-from .. import utils
 
 
 @extend_schema(tags=['Library'])
 @extend_schema_view()
 class LibraryActiveView(generics.ListAPIView):
     ''' Endpoint: Get list of library items available for active user. '''
-    permission_classes = (permissions.AllowAny,)
+    permission_classes = (permissions.Anyone,)
     serializer_class = s.LibraryItemSerializer
 
     def get_queryset(self):
@@ -40,7 +40,7 @@ class LibraryActiveView(generics.ListAPIView):
 @extend_schema_view()
 class LibraryAdminView(generics.ListAPIView):
     ''' Endpoint: Get list of all library items. Admin only '''
-    permission_classes = (permissions.IsAdminUser,)
+    permission_classes = (permissions.GlobalAdmin,)
     serializer_class = s.LibraryItemSerializer
 
     def get_queryset(self):
@@ -51,7 +51,7 @@ class LibraryAdminView(generics.ListAPIView):
 @extend_schema_view()
 class LibraryTemplatesView(generics.ListAPIView):
     ''' Endpoint: Get list of templates. '''
-    permission_classes = (permissions.AllowAny,)
+    permission_classes = (permissions.Anyone,)
     serializer_class = s.LibraryItemSerializer
 
     def get_queryset(self):
@@ -79,14 +79,14 @@ class LibraryViewSet(viewsets.ModelViewSet):
             return serializer.save()
 
     def get_permissions(self):
-        if self.action in ['update', 'destroy', 'partial_update']:
-            permission_list = [utils.ObjectOwnerOrAdmin]
+        if self.action in ['destroy']:
+            permission_list = [permissions.ItemOwner]
+        elif self.action in ['update', 'partial_update']:
+            permission_list = [permissions.ItemEditor]
         elif self.action in ['create', 'clone', 'subscribe', 'unsubscribe']:
-            permission_list = [permissions.IsAuthenticated]
-        elif self.action in ['claim']:
-            permission_list = [utils.IsClaimable]
+            permission_list = [permissions.GlobalUser]
         else:
-            permission_list = [permissions.AllowAny]
+            permission_list = [permissions.Anyone]
         return [permission() for permission in permission_list]
 
     def _get_item(self) -> m.LibraryItem:
@@ -134,32 +134,6 @@ class LibraryViewSet(viewsets.ModelViewSet):
             )
         return Response(status=c.HTTP_400_BAD_REQUEST)
 
-    @extend_schema(
-        summary='claim item',
-        tags=['Library'],
-        request=None,
-        responses={
-            c.HTTP_200_OK: s.LibraryItemSerializer,
-            c.HTTP_403_FORBIDDEN: None,
-            c.HTTP_404_NOT_FOUND: None
-        }
-    )
-    @transaction.atomic
-    @action(detail=True, methods=['post'])
-    def claim(self, request: Request, pk=None):
-        ''' Endpoint: Claim ownership of LibraryItem. '''
-        item = self._get_item()
-        if item.owner == self.request.user:
-            return Response(status=c.HTTP_304_NOT_MODIFIED)
-        else:
-            item.owner = cast(m.User, self.request.user)
-            item.save()
-            m.Subscription.subscribe(user=item.owner, item=item)
-            return Response(
-                status=c.HTTP_200_OK,
-                data=s.LibraryItemSerializer(item).data
-            )
-
     @extend_schema(
         summary='subscribe to item',
         tags=['Library'],
diff --git a/rsconcept/backend/apps/rsform/views/rsforms.py b/rsconcept/backend/apps/rsform/views/rsforms.py
index c206828a..4e8ffb33 100644
--- a/rsconcept/backend/apps/rsform/views/rsforms.py
+++ b/rsconcept/backend/apps/rsform/views/rsforms.py
@@ -6,7 +6,7 @@ import pyconcept
 from django.db import transaction
 from django.http import HttpResponse
 from drf_spectacular.utils import extend_schema, extend_schema_view
-from rest_framework import generics, permissions
+from rest_framework import generics
 from rest_framework import status as c
 from rest_framework import views, viewsets
 from rest_framework.decorators import action, api_view
@@ -15,6 +15,7 @@ from rest_framework.response import Response
 
 from .. import messages as msg
 from .. import models as m
+from .. import permissions
 from .. import serializers as s
 from .. import utils
 
@@ -33,9 +34,9 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
         ''' Determine permission class. '''
         if self.action in ['load_trs', 'cst_create', 'cst_delete_multiple',
                            'reset_aliases', 'cst_rename', 'cst_substitute']:
-            permission_list = [utils.ObjectOwnerOrAdmin]
+            permission_list = [permissions.ItemOwner]
         else:
-            permission_list = [permissions.AllowAny]
+            permission_list = [permissions.Anyone]
         return [permission() for permission in permission_list]
 
     @extend_schema(
@@ -402,7 +403,7 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
 class TrsImportView(views.APIView):
     ''' Endpoint: Upload RS form in Exteor format. '''
     serializer_class = s.FileSerializer
-    permission_classes = [permissions.IsAuthenticated]
+    permission_classes = [permissions.GlobalUser]
 
     @extend_schema(
         summary='import TRS file into RSForm',
diff --git a/rsconcept/backend/apps/rsform/views/versions.py b/rsconcept/backend/apps/rsform/views/versions.py
index bf7e21d6..a5e69c9a 100644
--- a/rsconcept/backend/apps/rsform/views/versions.py
+++ b/rsconcept/backend/apps/rsform/views/versions.py
@@ -3,7 +3,7 @@ from typing import cast
 
 from django.http import HttpResponse
 from drf_spectacular.utils import extend_schema, extend_schema_view
-from rest_framework import generics, permissions
+from rest_framework import generics
 from rest_framework import status as c
 from rest_framework import viewsets
 from rest_framework.decorators import action, api_view, permission_classes
@@ -11,25 +11,22 @@ from rest_framework.request import Request
 from rest_framework.response import Response
 
 from .. import models as m
+from .. import permissions
 from .. import serializers as s
 from .. import utils
 
 
 @extend_schema(tags=['Version'])
 @extend_schema_view()
-class VersionViewset(viewsets.GenericViewSet, generics.RetrieveUpdateDestroyAPIView):
+class VersionViewset(
+    viewsets.GenericViewSet,
+    generics.RetrieveUpdateDestroyAPIView,
+    permissions.EditorMixin
+):
     ''' Endpoint: Get / Update Constituenta. '''
     queryset = m.Version.objects.all()
     serializer_class = s.VersionSerializer
 
-    def get_permissions(self):
-        result = super().get_permissions()
-        if self.request.method.upper() == 'GET':
-            result.append(permissions.AllowAny())
-        else:
-            result.append(utils.ItemOwnerOrAdmin())
-        return result
-
     @extend_schema(
         summary='restore version data into current item',
         request=None,
@@ -62,7 +59,7 @@ class VersionViewset(viewsets.GenericViewSet, generics.RetrieveUpdateDestroyAPIV
     }
 )
 @api_view(['POST'])
-@permission_classes([permissions.IsAuthenticated])
+@permission_classes([permissions.GlobalUser])
 def create_version(request: Request, pk_item: int):
     ''' Endpoint: Create new version for RSForm copying current content. '''
     try:
diff --git a/rsconcept/frontend/src/app/backendAPI.ts b/rsconcept/frontend/src/app/backendAPI.ts
index b739ad58..f78cb7d6 100644
--- a/rsconcept/frontend/src/app/backendAPI.ts
+++ b/rsconcept/frontend/src/app/backendAPI.ts
@@ -246,13 +246,6 @@ export function deleteLibraryItem(target: string, request: FrontAction) {
   });
 }
 
-export function postClaimLibraryItem(target: string, request: FrontPull<ILibraryItem>) {
-  AxiosPost({
-    endpoint: `/api/library/${target}/claim`,
-    request: request
-  });
-}
-
 export function postSubscribe(target: string, request: FrontAction) {
   AxiosPost({
     endpoint: `/api/library/${target}/subscribe`,
diff --git a/rsconcept/frontend/src/context/RSFormContext.tsx b/rsconcept/frontend/src/context/RSFormContext.tsx
index 72a31397..dff6d045 100644
--- a/rsconcept/frontend/src/context/RSFormContext.tsx
+++ b/rsconcept/frontend/src/context/RSFormContext.tsx
@@ -20,7 +20,6 @@ import {
   patchSubstituteConstituents,
   patchUploadTRS,
   patchVersion,
-  postClaimLibraryItem,
   postCreateVersion,
   postNewConstituenta,
   postSubscribe
@@ -63,7 +62,6 @@ interface IRSFormContext {
   isSubscribed: boolean;
 
   update: (data: ILibraryUpdateData, callback?: DataCallback<ILibraryItem>) => void;
-  claim: (callback?: DataCallback<ILibraryItem>) => void;
   subscribe: (callback?: () => void) => void;
   unsubscribe: (callback?: () => void) => void;
   download: (callback: DataCallback<Blob>) => void;
@@ -180,29 +178,6 @@ export const RSFormState = ({ schemaID, versionID, children }: RSFormStateProps)
     [schemaID, setError, setSchema, schema, library]
   );
 
-  const claim = useCallback(
-    (callback?: DataCallback<ILibraryItem>) => {
-      if (!schema || !user) {
-        return;
-      }
-      setError(undefined);
-      postClaimLibraryItem(schemaID, {
-        showError: true,
-        setLoading: setProcessing,
-        onError: setError,
-        onSuccess: newData => {
-          setSchema(Object.assign(schema, newData));
-          library.localUpdateItem(newData);
-          if (!user.subscriptions.includes(newData.id)) {
-            user.subscriptions.push(newData.id);
-          }
-          if (callback) callback(newData);
-        }
-      });
-    },
-    [schemaID, setError, schema, user, setSchema, library]
-  );
-
   const subscribe = useCallback(
     (callback?: () => void) => {
       if (!schema || !user) {
@@ -543,7 +518,6 @@ export const RSFormState = ({ schemaID, versionID, children }: RSFormStateProps)
         update,
         download,
         upload,
-        claim,
         restoreOrder,
         resetAliases,
         produceStructure,
diff --git a/rsconcept/frontend/src/pages/RSFormPage/EditorRSForm/RSFormToolbar.tsx b/rsconcept/frontend/src/pages/RSFormPage/EditorRSForm/RSFormToolbar.tsx
index ae86452f..1a55ee95 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/EditorRSForm/RSFormToolbar.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/EditorRSForm/RSFormToolbar.tsx
@@ -2,15 +2,7 @@
 
 import { useMemo } from 'react';
 
-import {
-  IconDestroy,
-  IconDownload,
-  IconFollow,
-  IconFollowOff,
-  IconOwner,
-  IconSave,
-  IconShare
-} from '@/components/Icons';
+import { IconDestroy, IconDownload, IconFollow, IconFollowOff, IconSave, IconShare } from '@/components/Icons';
 import BadgeHelp from '@/components/info/BadgeHelp';
 import MiniButton from '@/components/ui/MiniButton';
 import Overlay from '@/components/ui/Overlay';
@@ -28,7 +20,7 @@ interface RSFormToolbarProps {
   onDestroy: () => void;
 }
 
-function RSFormToolbar({ modified, anonymous, subscribed, claimable, onSubmit, onDestroy }: RSFormToolbarProps) {
+function RSFormToolbar({ modified, anonymous, subscribed, onSubmit, onDestroy }: RSFormToolbarProps) {
   const controller = useRSEdit();
   const canSave = useMemo(() => modified && !controller.isProcessing, [modified, controller.isProcessing]);
   return (
@@ -65,14 +57,6 @@ function RSFormToolbar({ modified, anonymous, subscribed, claimable, onSubmit, o
           onClick={controller.toggleSubscribe}
         />
       ) : null}
-      {!anonymous && claimable ? (
-        <MiniButton
-          title='Стать владельцем'
-          icon={<IconOwner size='1.25rem' className='icon-green' />}
-          disabled={controller.isProcessing}
-          onClick={controller.claim}
-        />
-      ) : null}
       {controller.isMutable ? (
         <MiniButton
           title='Удалить схему'
diff --git a/rsconcept/frontend/src/pages/RSFormPage/RSEditContext.tsx b/rsconcept/frontend/src/pages/RSFormPage/RSEditContext.tsx
index b28fdf94..344e7f67 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/RSEditContext.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/RSEditContext.tsx
@@ -80,7 +80,6 @@ interface IRSEditContext {
   promptTemplate: () => void;
   promptClone: () => void;
   promptUpload: () => void;
-  claim: () => void;
   share: () => void;
   toggleSubscribe: () => void;
   download: () => void;
@@ -488,13 +487,6 @@ export const RSEditState = ({
     });
   }, [model, isModified]);
 
-  const claim = useCallback(() => {
-    if (!window.confirm('Вы уверены, что хотите стать владельцем данной схемы?')) {
-      return;
-    }
-    model.claim(() => toast.success('Вы стали владельцем схемы'));
-  }, [model]);
-
   const share = useCallback(() => {
     const currentRef = window.location.href;
     const url = currentRef.includes('?') ? currentRef + '&share' : currentRef + '?share';
@@ -547,7 +539,6 @@ export const RSEditState = ({
         promptClone,
         promptUpload: () => setShowUpload(true),
         download,
-        claim,
         share,
         toggleSubscribe,
 
diff --git a/rsconcept/frontend/src/pages/RSFormPage/RSTabsMenu.tsx b/rsconcept/frontend/src/pages/RSFormPage/RSTabsMenu.tsx
index 777c80f1..564c8d88 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/RSTabsMenu.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/RSTabsMenu.tsx
@@ -52,11 +52,6 @@ function RSTabsMenu({ onDestroy }: RSTabsMenuProps) {
   const editMenu = useDropdown();
   const accessMenu = useDropdown();
 
-  function handleClaimOwner() {
-    editMenu.hide();
-    controller.claim();
-  }
-
   function handleDelete() {
     schemaMenu.hide();
     onDestroy();
@@ -140,14 +135,6 @@ function RSTabsMenu({ onDestroy }: RSTabsMenuProps) {
           onClick={schemaMenu.toggle}
         />
         <Dropdown isOpen={schemaMenu.isOpen}>
-          {user ? (
-            <DropdownButton
-              text={model.isOwned ? 'Вы — владелец' : 'Стать владельцем'}
-              icon={<IconOwner size='1rem' className='icon-green' />}
-              disabled={!model.isClaimable && !model.isOwned}
-              onClick={!model.isOwned && model.isClaimable ? handleClaimOwner : undefined}
-            />
-          ) : null}
           <DropdownButton
             text='Поделиться'
             icon={<IconShare size='1rem' className='icon-primary' />}