#4723 - When pressing Enter, a user can create new sequences in the “…

…Modify RNA Builder” mode (#6178)

* 4723-when-pressing-enter-a-user-can-create-new-sequences-in-the-modify-rna-builder-mode

* clean code

---------

Co-authored-by: Andrey Menshikov <andrey.menshikov@bostongene.com>

packages/ketcher-core/src/application/editor/modes/SequenceMode.ts

@@ -176,6 +176,9 @@ export class SequenceMode extends BaseMode {
   }
 
   public startNewSequence(eventData?: StartNewSequenceEventData) {
+    if (CoreEditor.provideEditorInstance()?.isSequenceEditInRNABuilderMode) {
+      return;
+    }
     const currentChainIndex = this.isEditMode
       ? SequenceRenderer.currentChainIndex
       : SequenceRenderer.chainsCollection.chains.length - 1;