diff --git a/components/anchordocking/anchordockstorage.pas b/components/anchordocking/anchordockstorage.pas
index 73f8f6bef8..63ad56bbb4 100644
--- a/components/anchordocking/anchordockstorage.pas
+++ b/components/anchordocking/anchordockstorage.pas
@@ -1444,6 +1444,9 @@ begin
       // layouts and pages with only one child
       // => move grandchildren up and delete childnode
       ReplaceWithChildren(ChildNode);
+    end else begin
+      // unknown, maybe crap from older versions
+      DeleteNode(ChildNode);
     end;
 
     i:=Min(i,Count)-1;