diff --git a/client/src/app/core/core-services/autoupdate.service.ts b/client/src/app/core/core-services/autoupdate.service.ts
index 49ae85aaa..c771352dc 100644
--- a/client/src/app/core/core-services/autoupdate.service.ts
+++ b/client/src/app/core/core-services/autoupdate.service.ts
@@ -112,7 +112,11 @@ export class AutoupdateService {
 
             // Add the objects to the DataStore.
             for (const collection of Object.keys(autoupdate.changed)) {
-                await this.DS.add(this.mapObjectsToBaseModels(collection, autoupdate.changed[collection]));
+                if (this.modelMapper.isCollectionRegistered(collection)) {
+                    await this.DS.add(this.mapObjectsToBaseModels(collection, autoupdate.changed[collection]));
+                } else {
+                    console.error(`Unregistered collection "${collection}". Ignore it.`);
+                }
             }
 
             await this.DS.flushToStorage(autoupdate.to_change_id);
@@ -130,9 +134,6 @@ export class AutoupdateService {
      */
     private mapObjectsToBaseModels(collection: string, models: object[]): BaseModel[] {
         const targetClass = this.modelMapper.getModelConstructor(collection);
-        if (!targetClass) {
-            throw new Error(`Unregistered resource ${collection}`);
-        }
         return models.map(model => new targetClass(model));
     }
 
diff --git a/client/src/app/core/core-services/collectionStringMapper.service.ts b/client/src/app/core/core-services/collectionStringMapper.service.ts
index b91aeaa9a..6b517c219 100644
--- a/client/src/app/core/core-services/collectionStringMapper.service.ts
+++ b/client/src/app/core/core-services/collectionStringMapper.service.ts
@@ -65,27 +65,39 @@ export class CollectionStringMapperService {
         }
     }
 
+    public isCollectionRegistered(collectionString: string): boolean {
+        return !!this.collectionStringMapping[collectionString];
+    }
+
     /**
      * @param obj The object to get the model constructor from.
      * @returns the model constructor
      */
-    public getModelConstructor<M extends BaseModel>(obj: TypeIdentifier): ModelConstructor<M> {
-        return this.collectionStringMapping[this.getCollectionString(obj)][0] as ModelConstructor<M>;
+    public getModelConstructor<M extends BaseModel>(obj: TypeIdentifier): ModelConstructor<M> | null {
+        if (this.isCollectionRegistered(this.getCollectionString(obj))) {
+            return this.collectionStringMapping[this.getCollectionString(obj)][0] as ModelConstructor<M>;
+        }
     }
 
     /**
      * @param obj The object to get the view model constructor from.
      * @returns the view model constructor
      */
-    public getViewModelConstructor<M extends BaseViewModel>(obj: TypeIdentifier): ViewModelConstructor<M> {
-        return this.collectionStringMapping[this.getCollectionString(obj)][1] as ViewModelConstructor<M>;
+    public getViewModelConstructor<M extends BaseViewModel>(obj: TypeIdentifier): ViewModelConstructor<M> | null {
+        if (this.isCollectionRegistered(this.getCollectionString(obj))) {
+            return this.collectionStringMapping[this.getCollectionString(obj)][1] as ViewModelConstructor<M>;
+        }
     }
 
     /**
      * @param obj The object to get the repository from.
      * @returns the repository
      */
-    public getRepository<V extends BaseViewModel, M extends BaseModel>(obj: TypeIdentifier): BaseRepository<V, M> {
-        return this.collectionStringMapping[this.getCollectionString(obj)][2] as BaseRepository<V, M>;
+    public getRepository<V extends BaseViewModel, M extends BaseModel>(
+        obj: TypeIdentifier
+    ): BaseRepository<V, M> | null {
+        if (this.isCollectionRegistered(this.getCollectionString(obj))) {
+            return this.collectionStringMapping[this.getCollectionString(obj)][2] as BaseRepository<V, M>;
+        }
     }
 }