diff --git a/flows/label_ocr.py b/flows/label_ocr.py
index aad64af..3909e5a 100644
--- a/flows/label_ocr.py
+++ b/flows/label_ocr.py
@@ -33,7 +33,7 @@ def _result_to_fields(r) -> dict[str, str | None]:
 
 
 def _has_running_peer() -> bool:
-    """检查是否有同类 flow run 正在运行(查到 >1 个说明有其他实例)。"""
+    """检查是否有同类 flow run 正在运行(查到 >1 个 RUNNING 说明有其他实例)。"""
     api_url = os.environ.get("PREFECT_API_URL", "http://localhost:4200/api")
     dep_id = str(deployment.id) if deployment.id else ""
     if not dep_id:
@@ -43,13 +43,15 @@ def _has_running_peer() -> bool:
             f"{api_url}/flow_runs/filter",
             json={
                 "flow_runs": {"deployment_id": {"any_": [dep_id]}},
-                "state": {"type": {"any_": ["RUNNING"]}},
+                "limit": 10,
+                "sort": "START_TIME_DESC",
             },
-            params={"limit": 10},
             timeout=10,
         )
         resp.raise_for_status()
-        return len(resp.json()) > 1
+        runs = resp.json()
+        running = sum(1 for r in runs if r.get("state", {}).get("type") == "RUNNING")
+        return running > 1
     except Exception:
         return False