diff --git a/src/objit/include/objit/common/ob_item_type.h b/src/objit/include/objit/common/ob_item_type.h
index d690da0eea..b2af5b7ed4 100755
--- a/src/objit/include/objit/common/ob_item_type.h
+++ b/src/objit/include/objit/common/ob_item_type.h
@@ -2416,6 +2416,7 @@ typedef enum ObItemType
 
   T_IGNORE_UNKNOWN_USER,
   T_SHOW_PROFILE,
+  T_ALTER_TABLE_FORCE,
   T_MAX //Attention: add a new type before T_MAX
 } ObItemType;
 
diff --git a/src/storage/multi_data_source/compile_utility/mds_register.h b/src/storage/multi_data_source/compile_utility/mds_register.h
index 0d7b1418d1..9aa86864aa 100644
--- a/src/storage/multi_data_source/compile_utility/mds_register.h
+++ b/src/storage/multi_data_source/compile_utility/mds_register.h
@@ -117,6 +117,7 @@ _GENERATE_MDS_FRAME_CODE_FOR_TRANSACTION_(HELPER_CLASS, BUFFER_CTX_TYPE, ID, ENU
                                           ::oceanbase::storage::ObTransferDestPrepareTxCtx,\
                                           28,\
                                           TRANSFER_DEST_PREPARE)
+  // UNBIND_LOB_TABLET: ID = 29 for drop lob tablet when drop column instant.
 #undef GENERATE_MDS_FRAME_CODE_FOR_TRANSACTION
 #endif
 /**************************************************************************************************/