diff --git a/src/main/resources/db/migration/V21__STUDENT_EXERCISE_ASSIGNMENT_GITLAB_CLONE_URL.sql b/src/main/resources/db/migration/V21__STUDENT_EXERCISE_ASSIGNMENT_GITLAB_CLONE_URL.sql
deleted file mode 100644
index af356c7..0000000
--- a/src/main/resources/db/migration/V21__STUDENT_EXERCISE_ASSIGNMENT_GITLAB_CLONE_URL.sql
+++ /dev/null
@@ -1,2 +0,0 @@
-ALTER TABLE student_exercise_assignment
-    ADD gitlab_clone_url VARCHAR(255);
diff --git a/src/main/resources/db/migration/V23__STUDENT_EXERCISE_ASSIGNMENT_GITLAB_CLONE_URL.sql b/src/main/resources/db/migration/V23__STUDENT_EXERCISE_ASSIGNMENT_GITLAB_CLONE_URL.sql
new file mode 100644
index 0000000..7ef4f84
--- /dev/null
+++ b/src/main/resources/db/migration/V23__STUDENT_EXERCISE_ASSIGNMENT_GITLAB_CLONE_URL.sql
@@ -0,0 +1,2 @@
+ALTER TABLE student_exercise_assignment
+    ADD column if not exists gitlab_clone_url VARCHAR(255);