diff --git a/apps/api/migrations/fix_playbooks_array_to_jsonb.sql b/apps/api/migrations/fix_playbooks_array_to_jsonb.sql
new file mode 100644
index 00000000..4cf2193d
--- /dev/null
+++ b/apps/api/migrations/fix_playbooks_array_to_jsonb.sql
@@ -0,0 +1,11 @@
+-- 修正 playbooks 表 text[] 欄位 → jsonb
+-- 原因: ORM 送 JSON type，DB 欄位為 text[]，導致 DatatypeMismatchError
+-- 2026-04-15 ogt + Claude Sonnet 4.6（亞太）: 已手動套用到 prod
+
+ALTER TABLE playbooks ALTER COLUMN source_incident_ids DROP DEFAULT;
+ALTER TABLE playbooks ALTER COLUMN source_incident_ids TYPE jsonb USING to_jsonb(source_incident_ids);
+ALTER TABLE playbooks ALTER COLUMN source_incident_ids SET DEFAULT '[]'::jsonb;
+
+ALTER TABLE playbooks ALTER COLUMN tags DROP DEFAULT;
+ALTER TABLE playbooks ALTER COLUMN tags TYPE jsonb USING to_jsonb(tags);
+ALTER TABLE playbooks ALTER COLUMN tags SET DEFAULT '[]'::jsonb;
diff --git a/apps/api/src/services/playbook_seed_service.py b/apps/api/src/services/playbook_seed_service.py
index 977def53..437afdab 100644
--- a/apps/api/src/services/playbook_seed_service.py
+++ b/apps/api/src/services/playbook_seed_service.py
@@ -43,7 +43,7 @@ async def seed_playbooks_from_rules() -> None:
         repo = get_playbook_repository()
 
         # 取得現有 playbook source_ids，避免重複建立
-        existing = await repo.list_playbooks(status=PlaybookStatus.APPROVED, limit=500)
+        existing, _ = await repo.list_playbooks(status=PlaybookStatus.APPROVED, limit=500)
         existing_sources = {p.source for p in existing if p.source}
 
         seeded = 0