diff --git a/source/blender/blenkernel/BKE_lib_id.h b/source/blender/blenkernel/BKE_lib_id.h
index a393d4f4f98..d2a489d60fa 100644
--- a/source/blender/blenkernel/BKE_lib_id.h
+++ b/source/blender/blenkernel/BKE_lib_id.h
@@ -308,6 +308,15 @@ void BKE_id_free_us(struct Main *bmain, void *idv) ATTR_NONNULL();
  * Properly delete a single ID from given \a bmain database.
  */
 void BKE_id_delete(struct Main *bmain, void *idv) ATTR_NONNULL();
+/**
+ * Like BKE_id_delete, but with extra corner-case options.
+ *
+ * \param extra_remapping_flags Additional `ID_REMAP_` flags to pass to remapping code when
+ * ensuring that deleted IDs are not used by any other ID in given `bmain`. Typical example would
+ * be e.g. `ID_REMAP_FORCE_UI_POINTERS`, required when default UI-handling callbacks of remapping
+ * code won't be working (e.g. from readfile code). */
+void BKE_id_delete_ex(struct Main *bmain, void *idv, const int extra_remapping_flags)
+    ATTR_NONNULL(1, 2);
 /**
  * Properly delete all IDs tagged with \a LIB_TAG_DOIT, in given \a bmain database.
  *
diff --git a/source/blender/blenkernel/intern/lib_id_delete.c b/source/blender/blenkernel/intern/lib_id_delete.c
index c4200938cb9..19bd8f57f49 100644
--- a/source/blender/blenkernel/intern/lib_id_delete.c
+++ b/source/blender/blenkernel/intern/lib_id_delete.c
@@ -199,7 +199,9 @@ void BKE_id_free_us(Main *bmain, void *idv) /* test users */
   }
 }
 
-static size_t id_delete(Main *bmain, const bool do_tagged_deletion)
+static size_t id_delete(Main *bmain,
+                        const bool do_tagged_deletion,
+                        const int extra_remapping_flags)
 {
   const int tag = LIB_TAG_DOIT;
   ListBase *lbarray[INDEX_ID_MAX];
@@ -211,6 +213,8 @@ static size_t id_delete(Main *bmain, const bool do_tagged_deletion)
   const int free_flag = LIB_ID_FREE_NO_UI_USER |
                         (do_tagged_deletion ? LIB_ID_FREE_NO_MAIN | LIB_ID_FREE_NO_USER_REFCOUNT :
                                               0);
+  const int remapping_flags = (ID_REMAP_FLAG_NEVER_NULL_USAGE | ID_REMAP_FORCE_NEVER_NULL_USAGE |
+                               ID_REMAP_FORCE_INTERNAL_RUNTIME_POINTERS | extra_remapping_flags);
   ListBase tagged_deleted_ids = {NULL};
 
   base_count = set_listbasepointers(bmain, lbarray);
@@ -261,11 +265,7 @@ static size_t id_delete(Main *bmain, const bool do_tagged_deletion)
        * links, this can lead to nasty crashing here in second, actual deleting loop.
        * Also, this will also flag users of deleted data that cannot be unlinked
        * (object using deleted obdata, etc.), so that they also get deleted. */
-      BKE_libblock_remap_multiple_locked(bmain,
-                                         id_remapper,
-                                         ID_REMAP_FLAG_NEVER_NULL_USAGE |
-                                             ID_REMAP_FORCE_NEVER_NULL_USAGE |
-                                             ID_REMAP_FORCE_INTERNAL_RUNTIME_POINTERS);
+      BKE_libblock_remap_multiple_locked(bmain, id_remapper, remapping_flags);
       BKE_id_remapper_clear(id_remapper);
     }
 
@@ -329,11 +329,7 @@ static size_t id_delete(Main *bmain, const bool do_tagged_deletion)
        * links, this can lead to nasty crashing here in second, actual deleting loop.
        * Also, this will also flag users of deleted data that cannot be unlinked
        * (object using deleted obdata, etc.), so that they also get deleted. */
-      BKE_libblock_remap_multiple_locked(bmain,
-                                         remapper,
-                                         (ID_REMAP_FLAG_NEVER_NULL_USAGE |
-                                          ID_REMAP_FORCE_NEVER_NULL_USAGE |
-                                          ID_REMAP_FORCE_INTERNAL_RUNTIME_POINTERS));
+      BKE_libblock_remap_multiple_locked(bmain, remapper, remapping_flags);
     }
     BKE_id_remapper_free(remapper);
   }
@@ -371,7 +367,7 @@ static size_t id_delete(Main *bmain, const bool do_tagged_deletion)
   return num_datablocks_deleted;
 }
 
-void BKE_id_delete(Main *bmain, void *idv)
+void BKE_id_delete_ex(Main *bmain, void *idv, const int extra_remapping_flags)
 {
   BLI_assert_msg((((ID *)idv)->tag & LIB_TAG_NO_MAIN) == 0,
                  "Cannot be used with IDs outside of Main");
@@ -379,12 +375,17 @@ void BKE_id_delete(Main *bmain, void *idv)
   BKE_main_id_tag_all(bmain, LIB_TAG_DOIT, false);
   ((ID *)idv)->tag |= LIB_TAG_DOIT;
 
-  id_delete(bmain, false);
+  id_delete(bmain, false, extra_remapping_flags);
+}
+
+void BKE_id_delete(Main *bmain, void *idv)
+{
+  BKE_id_delete_ex(bmain, idv, 0);
 }
 
 size_t BKE_id_multi_tagged_delete(Main *bmain)
 {
-  return id_delete(bmain, true);
+  return id_delete(bmain, true, 0);
 }
 
 /* -------------------------------------------------------------------- */
diff --git a/source/blender/blenloader/intern/blend_validate.cc b/source/blender/blenloader/intern/blend_validate.cc
index b8ab1dd2c4c..f04fdee2288 100644
--- a/source/blender/blenloader/intern/blend_validate.cc
+++ b/source/blender/blenloader/intern/blend_validate.cc
@@ -24,6 +24,7 @@
 
 #include "BKE_key.h"
 #include "BKE_lib_id.h"
+#include "BKE_lib_remap.h"
 #include "BKE_library.h"
 #include "BKE_main.h"
 #include "BKE_report.h"
@@ -196,7 +197,10 @@ bool BLO_main_validate_shapekeys(Main *bmain, ReportList *reports)
                 "Shapekey %s has an invalid 'from' pointer (%p), it will be deleted",
                 shapekey->id.name,
                 shapekey->from);
-    BKE_id_delete(bmain, shapekey);
+    /* NOTE: also need to remap UI data ID pointers here, since `bmain` is not the current
+     * `G_MAIN`, default UI-handling remapping callback (defined by call to
+     * `BKE_library_callback_remap_editor_id_reference_set`) won't work on exoected data here. */
+    BKE_id_delete_ex(bmain, shapekey, ID_REMAP_FORCE_UI_POINTERS);
   }
 
   return is_valid;