diff --git a/1748485013_table_daily_step_add_band_id.up.sql b/1748485013_table_daily_step_add_band_id.up.sql
index d9a57b2..bfe0f09 100644
--- a/1748485013_table_daily_step_add_band_id.up.sql
+++ b/1748485013_table_daily_step_add_band_id.up.sql
@@ -1,2 +1,2 @@
 ALTER TABLE `ufutx_daily_step`
-ADD COLUMN `band_id` integer not NULL COMMENT "手环id" after `id`
\ No newline at end of file
+ADD COLUMN `band_id` integer DEFAULT NULL COMMENT "手环id" after `id`
\ No newline at end of file