diff --git a/source/blender/blenkernel/intern/mesh_legacy_convert.cc b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
index d18b185b544..76a67d8ed68 100644
--- a/source/blender/blenkernel/intern/mesh_legacy_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
@@ -37,6 +37,7 @@
 #include "BKE_idprop.hh"
 #include "BKE_lib_id.hh"
 #include "BKE_main.hh"
+#include "BKE_main_namemap.hh"
 #include "BKE_mesh.hh"
 #include "BKE_mesh_legacy_convert.hh"
 #include "BKE_modifier.hh"
@@ -2381,6 +2382,7 @@ void BKE_main_mesh_legacy_convert_auto_smooth(Main &bmain)
       /* Move the node group to the requested library so that library data-blocks don't point to
        * local data-blocks. This requires making sure the name is unique in that library and
        * changing the name maps to be consistent with the new state. */
+      BKE_main_namemap_remove_name(&bmain, &new_group->id, new_group->id.name + 2);
       new_group->id.lib = library;
       BKE_id_new_name_validate(&bmain, &bmain.nodetrees, &new_group->id, nullptr, false);
       if (library) {