Fix (unreported) Outliner 'liboverride create hierarchy' applied on several IDs.

This operation can only be applied on one ID at a time, so only apply it
to the active Outliner item, and not all the selected ones.

Also renamed `Make Library Override` menu entry to `Make Library Override
Single` to emphasis this is not the 'default expected' option for the
user.

1 files changed, 12 insertions, 3 deletions

diff --git a/source/blender/editors/space_outliner/outliner_tools.cc b/source/blender/editors/space_outliner/outliner_tools.cc
index 03fc4c20fe5..2a3c0a9392b 100644
--- a/source/blender/editors/space_outliner/outliner_tools.cc
+++ b/source/blender/editors/space_outliner/outliner_tools.cc
@@ -814,6 +814,13 @@ static void id_override_library_create_fn(bContext *C,
                                           void *user_data)
 {
   BLI_assert(TSE_IS_REAL_ID(tselem));
+
+  /* We can only safely apply this operation on one item at a time, so only do it on the active
+   * one. */
+  if ((tselem->flag & TSE_ACTIVE) == 0) {
+    return;
+  }
+
   ID *id_root = tselem->id;
   OutlinerLibOverrideData *data = reinterpret_cast<OutlinerLibOverrideData *>(user_data);
   const bool do_hierarchy = data->do_hierarchy;
@@ -1829,13 +1836,15 @@ static const EnumPropertyItem prop_id_op_types[] = {
     {OUTLINER_IDOP_OVERRIDE_LIBRARY_CREATE,
      "OVERRIDE_LIBRARY_CREATE",
      0,
-     "Make Library Override",
-     "Make a local override of this linked data-block"},
+     "Make Library Override Single",
+     "Make a single, out-of-hierarchy local override of this linked data-block - only applies to "
+     "active Outliner item"},
     {OUTLINER_IDOP_OVERRIDE_LIBRARY_CREATE_HIERARCHY,
      "OVERRIDE_LIBRARY_CREATE_HIERARCHY",
      0,
      "Make Library Override Hierarchy",
-     "Make a local override of this linked data-block, and its hierarchy of dependencies"},
+     "Make a local override of this linked data-block, and its hierarchy of dependencies - only "
+     "applies to active Outliner item"},
     {OUTLINER_IDOP_OVERRIDE_LIBRARY_PROXY_CONVERT,
      "OVERRIDE_LIBRARY_PROXY_CONVERT",
      0,