1 files changed, 34 insertions, 11 deletions

diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index 37a6619876d..c9d519be450 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -2435,17 +2435,27 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
     }
   }
 
-  /**
-   * Versioning code until next subversion bump goes here.
-   *
-   * \note Be sure to check when bumping the version:
-   * - "versioning_userdef.c", #blo_do_versions_userdef
-   * - "versioning_userdef.c", #do_versions_theme
-   *
-   * \note Keep this message at the bottom of the function.
-   */
-  {
-    /* Keep this block, even when empty. */
+  if (!MAIN_VERSION_ATLEAST(bmain, 302, 7)) {
+    /* Generate 'system' liboverrides IDs.
+     * NOTE: This is a fairly rough process, based on very basic euristics. Should be enough for a
+     * do_version code though, this is a new optional feature, not a critical conversion. */
+    ID *id;
+    FOREACH_MAIN_ID_BEGIN (bmain, id) {
+      if (!ID_IS_OVERRIDE_LIBRARY_REAL(id) || ID_IS_LINKED(id)) {
+        /* Ignore non-real liboverrides, and linked ones. */
+        continue;
+      }
+      if (GS(id->name) == ID_OB) {
+        /* Never 'lock' an object into a system override for now. */
+        continue;
+      }
+      if (BKE_lib_override_library_is_user_edited(id)) {
+        /* Do not 'lock' an ID already edited by the user. */
+        continue;
+      }
+      id->override_library->flag |= IDOVERRIDE_LIBRARY_FLAG_SYSTEM_DEFINED;
+    }
+    FOREACH_MAIN_ID_END;
 
     /* Initialize brush curves sculpt settings. */
     LISTBASE_FOREACH (Brush *, brush, &bmain->brushes) {
@@ -2476,4 +2486,17 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
       }
     }
   }
+
+  /**
+   * Versioning code until next subversion bump goes here.
+   *
+   * \note Be sure to check when bumping the version:
+   * - "versioning_userdef.c", #blo_do_versions_userdef
+   * - "versioning_userdef.c", #do_versions_theme
+   *
+   * \note Keep this message at the bottom of the function.
+   */
+  {
+    /* Keep this block, even when empty. */
+  }
 }