From d5bc0fb4bbdbfa970c66c6f0d688feeffd3d28c0 Mon Sep 17 00:00:00 2001
From: Bastien Montagne <bastien@blender.org>
Date: Fri, 8 Aug 2025 12:30:04 +0200
Subject: [PATCH] Fix #144065: Do not transfer special user count (e.g. the
 fake user) when duplicating.

---
 source/blender/blenkernel/intern/brush.cc      | 2 +-
 source/blender/blenkernel/intern/collection.cc | 3 ++-
 source/blender/blenkernel/intern/object.cc     | 3 ++-
 source/blender/blenkernel/intern/scene.cc      | 3 ++-
 source/blender/editors/object/object_add.cc    | 2 +-
 5 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/source/blender/blenkernel/intern/brush.cc b/source/blender/blenkernel/intern/brush.cc
index d6a718de0a0..8c541a0697d 100644
--- a/source/blender/blenkernel/intern/brush.cc
+++ b/source/blender/blenkernel/intern/brush.cc
@@ -675,7 +675,7 @@ Brush *BKE_brush_duplicate(Main *bmain,
 
   if (!is_subprocess) {
     /* This code will follow into all ID links using an ID tagged with ID_TAG_NEW. */
-    BKE_libblock_relink_to_newid(bmain, &new_brush->id, 0);
+    BKE_libblock_relink_to_newid(bmain, &new_brush->id, ID_REMAP_SKIP_USER_CLEAR);
 
 #ifndef NDEBUG
     /* Call to `BKE_libblock_relink_to_newid` above is supposed to have cleared all those flags. */
diff --git a/source/blender/blenkernel/intern/collection.cc b/source/blender/blenkernel/intern/collection.cc
index 447aa1c72c4..afaf011ceb1 100644
--- a/source/blender/blenkernel/intern/collection.cc
+++ b/source/blender/blenkernel/intern/collection.cc
@@ -772,7 +772,8 @@ Collection *BKE_collection_duplicate(Main *bmain,
      * using the original obdata ID, leading to them being falsly detected as being in Edit mode,
      * and therefore not remapping their obdata to the newly duplicated one.
      * See #139715. */
-    BKE_libblock_relink_to_newid(bmain, &collection_new->id, ID_REMAP_FORCE_OBDATA_IN_EDITMODE);
+    BKE_libblock_relink_to_newid(
+        bmain, &collection_new->id, ID_REMAP_FORCE_OBDATA_IN_EDITMODE | ID_REMAP_SKIP_USER_CLEAR);
 
 #ifndef NDEBUG
     /* Call to `BKE_libblock_relink_to_newid` above is supposed to have cleared all those flags. */
diff --git a/source/blender/blenkernel/intern/object.cc b/source/blender/blenkernel/intern/object.cc
index afdec910556..35d472323ac 100644
--- a/source/blender/blenkernel/intern/object.cc
+++ b/source/blender/blenkernel/intern/object.cc
@@ -2664,7 +2664,8 @@ Object *BKE_object_duplicate(Main *bmain,
      * using the original obdata ID, leading to them being falsly detected as being in Edit mode,
      * and therefore not remapping their obdata to the newly duplicated one.
      * See #139715. */
-    BKE_libblock_relink_to_newid(bmain, &obn->id, ID_REMAP_FORCE_OBDATA_IN_EDITMODE);
+    BKE_libblock_relink_to_newid(
+        bmain, &obn->id, ID_REMAP_FORCE_OBDATA_IN_EDITMODE | ID_REMAP_SKIP_USER_CLEAR);
 
 #ifndef NDEBUG
     /* Call to `BKE_libblock_relink_to_newid` above is supposed to have cleared all those flags. */
diff --git a/source/blender/blenkernel/intern/scene.cc b/source/blender/blenkernel/intern/scene.cc
index 7995f6fd373..da21d605449 100644
--- a/source/blender/blenkernel/intern/scene.cc
+++ b/source/blender/blenkernel/intern/scene.cc
@@ -1983,7 +1983,8 @@ Scene *BKE_scene_duplicate(Main *bmain, Scene *sce, eSceneCopyMethod type)
        * using the original obdata ID, leading to them being falsly detected as being in Edit mode,
        * and therefore not remapping their obdata to the newly duplicated one.
        * See #139715. */
-      BKE_libblock_relink_to_newid(bmain, &sce_copy->id, ID_REMAP_FORCE_OBDATA_IN_EDITMODE);
+      BKE_libblock_relink_to_newid(
+          bmain, &sce_copy->id, ID_REMAP_FORCE_OBDATA_IN_EDITMODE | ID_REMAP_SKIP_USER_CLEAR);
 
 #ifndef NDEBUG
       /* Call to `BKE_libblock_relink_to_newid` above is supposed to have cleared all those
diff --git a/source/blender/editors/object/object_add.cc b/source/blender/editors/object/object_add.cc
index 3821d968d7c..c51ef2aaaf0 100644
--- a/source/blender/editors/object/object_add.cc
+++ b/source/blender/editors/object/object_add.cc
@@ -2342,7 +2342,7 @@ static void copy_object_set_idnew(bContext *C)
   Main *bmain = CTX_data_main(C);
 
   CTX_DATA_BEGIN (C, Object *, ob, selected_editable_objects) {
-    BKE_libblock_relink_to_newid(bmain, &ob->id, 0);
+    BKE_libblock_relink_to_newid(bmain, &ob->id, ID_REMAP_SKIP_USER_CLEAR);
   }
   CTX_DATA_END;