diff --git a/acrate_database/migrations/2024-11-18-160501_meta_subject-null/down.sql b/acrate_database/migrations/2024-11-18-160501_meta_subject-null/down.sql
new file mode 100644
index 0000000..58ab58c
--- /dev/null
+++ b/acrate_database/migrations/2024-11-18-160501_meta_subject-null/down.sql
@@ -0,0 +1,10 @@
+UPDATE meta_subjects SET subject = 'invalid:subject.null' WHERE subject IS NULL;
+
+ALTER TABLE meta_subjects ALTER subject SET NOT NULL;
+
+ALTER TABLE meta_subjects ADD CONSTRAINT either_subject_or_redirect_not_null
+	CHECK (
+		(subject IS NOT NULL AND redirect IS NULL)
+		OR
+		(subject IS NULL AND redirect IS NOT NULL)
+	);
diff --git a/acrate_database/migrations/2024-11-18-160501_meta_subject-null/up.sql b/acrate_database/migrations/2024-11-18-160501_meta_subject-null/up.sql
new file mode 100644
index 0000000..cba9028
--- /dev/null
+++ b/acrate_database/migrations/2024-11-18-160501_meta_subject-null/up.sql
@@ -0,0 +1,5 @@
+ALTER TABLE meta_subjects DROP CONSTRAINT either_subject_or_redirect_not_null;
+
+ALTER TABLE meta_subjects ALTER subject DROP NOT NULL;
+
+UPDATE meta_subjects SET subject = NULL WHERE subject = 'invalid:subject.null';