diff --git a/src/main/java/com/ycwl/basic/model/pc/device/req/VideoContinuityReportReq.java b/src/main/java/com/ycwl/basic/model/pc/device/req/VideoContinuityReportReq.java
index 09c6a6f1..76c72565 100644
--- a/src/main/java/com/ycwl/basic/model/pc/device/req/VideoContinuityReportReq.java
+++ b/src/main/java/com/ycwl/basic/model/pc/device/req/VideoContinuityReportReq.java
@@ -6,6 +6,9 @@ import lombok.NoArgsConstructor;
 
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Date;
 import java.util.List;
 
@@ -72,7 +75,7 @@ public class VideoContinuityReportReq {
     /**
      * 间隙列表（选填，当continuous=false时应提供）
      */
-    private List<GapInfoReq> gaps;
+    private List<GapInfoReq> gaps = Collections.emptyList();
 
     /**
      * 间隙信息
diff --git a/src/main/java/com/ycwl/basic/task/DeviceVideoContinuityCheckTask.java b/src/main/java/com/ycwl/basic/task/DeviceVideoContinuityCheckTask.java
index 7d0a03e4..65dd0a37 100644
--- a/src/main/java/com/ycwl/basic/task/DeviceVideoContinuityCheckTask.java
+++ b/src/main/java/com/ycwl/basic/task/DeviceVideoContinuityCheckTask.java
@@ -158,13 +158,23 @@ public class DeviceVideoContinuityCheckTask {
             // 执行连续性检查(允许2秒间隙)
             VideoContinuityResult result = operator.checkVideoContinuity(startDate, endDate, 2000L);
 
+            // 如果设备不支持连续性检查，检查是否已有外部上报的缓存记录
+            String redisKey = REDIS_KEY_PREFIX + device.getId();
+            if (!result.isSupport()) {
+                String existingCache = redisTemplate.opsForValue().get(redisKey);
+                if (existingCache != null) {
+                    // 已有缓存记录（可能是外部工具上报的），不覆盖
+                    log.debug("设备 {} 不支持内部连续性检查，但已有缓存记录，跳过覆盖", device.getId());
+                    return false;
+                }
+            }
+
             // 创建缓存对象
             DeviceVideoContinuityCache cache = DeviceVideoContinuityCache.fromResult(
                 device.getId(), result, startDate, endDate
             );
 
             // 存储到Redis
-            String redisKey = REDIS_KEY_PREFIX + device.getId();
             String cacheJson = objectMapper.writeValueAsString(cache);
             redisTemplate.opsForValue().set(redisKey, cacheJson, CACHE_TTL_HOURS, TimeUnit.HOURS);