diff --git a/rsconcept/frontend/src/features/oss/backend/oss-loader.ts b/rsconcept/frontend/src/features/oss/backend/oss-loader.ts
index a4107ecc..d8444a07 100644
--- a/rsconcept/frontend/src/features/oss/backend/oss-loader.ts
+++ b/rsconcept/frontend/src/features/oss/backend/oss-loader.ts
@@ -22,7 +22,7 @@ export class OssLoader {
   private items: ILibraryItem[];
 
   constructor(input: IOperationSchemaDTO, items: ILibraryItem[]) {
-    this.oss = input as unknown as IOperationSchema;
+    this.oss = structuredClone(input) as IOperationSchema;
     this.items = items;
   }
 
diff --git a/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts b/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts
index c18f653c..d0d25c42 100644
--- a/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts
+++ b/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts
@@ -24,7 +24,7 @@ export class RSFormLoader {
   private cstByID = new Map<number, IConstituenta>();
 
   constructor(input: IRSFormDTO) {
-    this.schema = input as unknown as IRSForm;
+    this.schema = structuredClone(input) as IRSForm;
     this.schema.version = input.version ?? 'latest';
   }