An unidentified "Document" tab is being created

Development Pipeline & Plugins Plugins
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2
  1. Besides.there were json and .ini configs. in %AppData%/Local and in Engine\Saved\Config\WindowsEditor.
  2. Graph creates a placeholder, and its name was “Document”. The tab identifier is required to be “Document”. This was exactly the problem, my identifier was different and could not replace the placeholder.
TSharedPtr<SDockTab> FDocumentTracker::OpenNewTab(TSharedPtr<FGenericTabHistory> InTabHistory, EOpenDocumentCause InOpenCause)
{

...

if (InOpenCause == ForceOpenNewDocument  || InOpenCause == OpenNewDocument)
		{
			TabManager->InsertNewDocumentTab( "Document", FTabManager::ESearchPreference::RequireClosedTab, NewTab.ToSharedRef() );
		}
		else if (InOpenCause == RestorePreviousDocument)
		{
			TabManager->RestoreDocumentTab( "Document", FTabManager::ESearchPreference::RequireClosedTab, NewTab.ToSharedRef() );

			// Clear tab history before this so previous restores don't show up
			History.RemoveAt(0, History.Num() - 1, true);
			CurrentHistoryIndex = History.Num() - 1;
		}

...

}