diff --git a/backend/src/main/resources/db/migration/V77__modify_schedule_test_id.sql b/backend/src/main/resources/db/migration/V77__modify_schedule_test_id.sql
new file mode 100644
index 0000000000..15a8e1591e
--- /dev/null
+++ b/backend/src/main/resources/db/migration/V77__modify_schedule_test_id.sql
@@ -0,0 +1,2 @@
+ALTER TABLE schedule
+    MODIFY COLUMN `key` VARCHAR(255);