diff --git a/api/viid_upload.go b/api/viid_upload.go
index f45ccc9..9caecae 100644
--- a/api/viid_upload.go
+++ b/api/viid_upload.go
@@ -4,6 +4,7 @@ import (
 	"ZhenTuLocalPassiveAdapter/logger"
 	"context"
 	"fmt"
+
 	"go.uber.org/zap"
 	"golang.org/x/sync/errgroup"
 )
diff --git a/fs/s3_adapter.go b/fs/s3_adapter.go
index 84c1a98..a40af2c 100644
--- a/fs/s3_adapter.go
+++ b/fs/s3_adapter.go
@@ -203,7 +203,11 @@ func init() {
 func cleanupCache() {
 	var keysToDelete []interface{}
 	s3Cache.Range(func(key, value interface{}) bool {
-		item := value.(cacheItem)
+		// 类型检查：跳过非 cacheItem 类型的值（例如 lock_xxx 对应的 *sync.Mutex）
+		item, ok := value.(cacheItem)
+		if !ok {
+			return true
+		}
 		if time.Now().After(item.expires) {
 			keysToDelete = append(keysToDelete, key)
 		}