diff --git a/vulnerabilities/migrations/0145_widen_related_advisory_severities_id.py b/vulnerabilities/migrations/0145_widen_related_advisory_severities_id.py
new file mode 100644
index 000000000..5f98657fb
--- /dev/null
+++ b/vulnerabilities/migrations/0145_widen_related_advisory_severities_id.py
@@ -0,0 +1,27 @@
+# Generated by Django 5.2.11 on 2026-10-24
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("vulnerabilities", "0144_remove_advisoryv2_advisory_latest_by_avid_idx_and_more"),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            sql=[
+                "ALTER TABLE vulnerabilities_advisoryv2_related_advisory_severities "
+                "ALTER COLUMN id TYPE bigint",
+                "ALTER SEQUENCE vulnerabilities_advisoryv2_related_advisory_severities_id_seq "
+                "AS bigint",
+            ],
+            reverse_sql=[
+                "ALTER TABLE vulnerabilities_advisoryv2_related_advisory_severities "
+                "ALTER COLUMN id TYPE integer",
+                "ALTER SEQUENCE vulnerabilities_advisoryv2_related_advisory_severities_id_seq "
+                "AS integer",
+            ],
+        ),
+    ]