diff --git a/apps/api/src/services/run_state_machine.py b/apps/api/src/services/run_state_machine.py
index 3fda1f26..e84c2b41 100644
--- a/apps/api/src/services/run_state_machine.py
+++ b/apps/api/src/services/run_state_machine.py
@@ -29,7 +29,7 @@ from __future__ import annotations
 
 import socket
 import uuid
-from datetime import datetime, timedelta, timezone
+from datetime import UTC, datetime, timedelta
 from typing import TYPE_CHECKING
 
 import structlog
@@ -66,6 +66,11 @@ TERMINAL_STATES = frozenset({"completed", "failed", "cancelled", "timeout"})
 _WORKER_ID = f"{socket.gethostname()}:{uuid.uuid4().hex[:8]}"
 
 
+def _utc_now_naive() -> datetime:
+    """Return UTC now matching AwoooP timestamp-without-timezone columns."""
+    return datetime.now(UTC).replace(tzinfo=None)
+
+
 # ─────────────────────────────────────────────────────────────────────────────
 # FSM 驗證
 # ─────────────────────────────────────────────────────────────────────────────
@@ -98,8 +103,8 @@ async def acquire_pending_run(
     同時只有一個 worker 可取得同一筆 run（PostgreSQL SKIP LOCKED 保證）。
     Returns None 表示目前沒有待處理的 run。
     """
-    lease_until = datetime.now(timezone.utc) + timedelta(seconds=LEASE_TTL_SECONDS)
-    now = datetime.now(timezone.utc)
+    now = _utc_now_naive()
+    lease_until = now + timedelta(seconds=LEASE_TTL_SECONDS)
 
     async with get_db_context(project_id) as db:
         # SKIP LOCKED：其他 worker 已鎖定的 row 直接跳過
@@ -154,9 +159,10 @@ async def acquire_pending_run(
     return run
 
 
-async def heartbeat(run_id: "UUID", project_id: str) -> None:
+async def heartbeat(run_id: UUID, project_id: str) -> None:
     """更新 run 的 heartbeat + 延長 lease TTL"""
-    new_lease = datetime.now(timezone.utc) + timedelta(seconds=LEASE_TTL_SECONDS)
+    now = _utc_now_naive()
+    new_lease = now + timedelta(seconds=LEASE_TTL_SECONDS)
     async with get_db_context(project_id) as db:
         await db.execute(
             update(AwoooPRunState)
@@ -165,14 +171,14 @@ async def heartbeat(run_id: "UUID", project_id: str) -> None:
                 AwoooPRunState.state == "running",
             )
             .values(
-                heartbeat_at=datetime.now(timezone.utc),
+                heartbeat_at=now,
                 lease_until=new_lease,
             )
         )
 
 
 async def transition(
-    run_id: "UUID",
+    run_id: UUID,
     project_id: str,
     to_state: str,
     *,
@@ -214,7 +220,7 @@ async def transition(
         if step_count_delta:
             values["step_count"] = AwoooPRunState.step_count + step_count_delta
         if to_state in TERMINAL_STATES:
-            values["completed_at"] = datetime.now(timezone.utc)
+            values["completed_at"] = _utc_now_naive()
             values["lease_until"] = None
             values["worker_id"] = None
 
@@ -245,7 +251,7 @@ async def reap_stale_runs(project_id: str) -> int:
 
     Returns: 處理的 stale run 數
     """
-    now = datetime.now(timezone.utc)
+    now = _utc_now_naive()
     reaped = 0
 
     async with get_db_context(project_id) as db:
diff --git a/docs/LOGBOOK.md b/docs/LOGBOOK.md
index 70691cc6..dfba3860 100644
--- a/docs/LOGBOOK.md
+++ b/docs/LOGBOOK.md
@@ -27,6 +27,7 @@
 - `ops/monitoring/alerts*.yml`：新增 `HostLoadAverageSustainedHigh`、`DockerContainerCpuSustainedHigh`、`DockerContainerCpuRunawayCritical`、`DockerContainerMemoryLimitPressure`、`DockerContainerRestartSpike`。
 - `apps/api/alert_rules.yaml`：新增 Docker/Host 過載路由，強制走 `SSH_DIAGNOSE`，禁止通用 docker restart。
 - API GitOps：用最新 `main` (`a57e3d3d`) 加本次兩個 API 修補檔，在 188 建置並推送 `192.168.0.110:5000/awoooi/api:resource-baseline-20260505-a57e3d3`；`k8s/awoooi-prod/kustomization.yaml` 指向此 tag，避免手動 `kubectl set image` 被 Argo 回滾。
+- API follow-up：新 image 上線後發現 AwoooP worker stale reaper 送 timezone-aware datetime 到 `TIMESTAMP WITHOUT TIME ZONE` 欄位，補 `_utc_now_naive()`，重建 `192.168.0.110:5000/awoooi/api:resource-baseline-20260505-e8e6748` 並將 GitOps tag 更新到此版。
 - `docs/runbooks/HOST-RESOURCE-BASELINE-110-188.md`：記錄 live 配額盤點、baseline policy、反模式與下一步 rollout 順序。
 - Prometheus 已 reload，97 條規則載入；新 baseline rules 全部存在。
 
@@ -38,8 +39,9 @@
 - Prometheus 新 baseline alerts 查詢目前無 firing。
 - 新規則目前 pending：110 `HostLoadAverageSustainedHigh`、110 `DockerContainerCpuSustainedHigh` for Sentry ClickHouse。
 - `apps/api/.venv/bin/python -m pytest apps/api/tests/test_classify_alert_early.py apps/api/tests/test_alert_rule_engine_validation.py -q` → 89 passed。
+- `apps/api/.venv/bin/python -m ruff check apps/api/src/services/run_state_machine.py` + `py_compile` → passed。
 - `ruff check apps/api/src/services/proactive_inspector.py`、`py_compile scripts/ops/docker-stats-textfile-exporter.py`、`git diff --check` → passed。
-- `kubectl kustomize k8s/awoooi-prod` → API/worker image 均解析為 `resource-baseline-20260505-a57e3d3`。
+- `kubectl kustomize k8s/awoooi-prod` → API/worker image 均解析為 `resource-baseline-20260505-e8e6748`。
 
 **下一步**：
 - 不要再降低 ClickHouse / Kafka memory limit；先觀察 backlog drain。
diff --git a/k8s/awoooi-prod/kustomization.yaml b/k8s/awoooi-prod/kustomization.yaml
index b3300fc3..a910aa7f 100644
--- a/k8s/awoooi-prod/kustomization.yaml
+++ b/k8s/awoooi-prod/kustomization.yaml
@@ -39,7 +39,7 @@ resources:
 images:
 - name: 192.168.0.110:5000/library/api:IMAGE_TAG_PLACEHOLDER
   newName: 192.168.0.110:5000/awoooi/api
-  newTag: resource-baseline-20260505-a57e3d3
+  newTag: resource-baseline-20260505-e8e6748
 - name: 192.168.0.110:5000/library/web:IMAGE_TAG_PLACEHOLDER
   newName: 192.168.0.110:5000/awoooi/web
   newTag: 00684403887745e35848bbbab5ac795cfdd6fd58