diff --git a/src/main/resources/db/migration/mysql/V255__add_maimai_140_ext_field.sql b/src/main/resources/db/migration/mysql/V255__add_maimai_140_ext_field.sql
deleted file mode 100644
index dac088c4..00000000
--- a/src/main/resources/db/migration/mysql/V255__add_maimai_140_ext_field.sql
+++ /dev/null
@@ -1,8 +0,0 @@
--- maimai2_user_playlog
-ALTER TABLE maimai2_user_playlog ADD COLUMN ext_bool1 BOOLEAN;
-ALTER TABLE maimai2_user_playlog ADD COLUMN ext_num4 INTEGER;
-UPDATE maimai2_user_playlog SET ext_num4=0;
-
--- maimai2_user_detail
-ALTER TABLE maimai2_user_detail ADD COLUMN current_play_count INTEGER;
-ALTER TABLE maimai2_user_detail ADD COLUMN rename_credit INTEGER;
\ No newline at end of file