diff --git a/servers/boe-server-all/src/main/java/com/xboe/school/study/api/StudyCourseTask.java b/servers/boe-server-all/src/main/java/com/xboe/school/study/api/StudyCourseTask.java
index b1e2beaa..0e70daee 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/school/study/api/StudyCourseTask.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/school/study/api/StudyCourseTask.java
@@ -149,7 +149,9 @@ public class StudyCourseTask {
                         }
                         // 8. 更新数据库（调用已有服务方法）
                         studyService.newAppendStudyDuration(studyId,null,courseContentId,appendtime,timestamp);
-                        if (studyItemId != null){
+                        log.info("-定时任务 saveStudyCourseItemLastTime ---studyItemId = " + studyItemId);
+                        if (studyItemId != null && !studyItemId.equals("null")){
+                            log.info("-定时任务 saveStudyCourseItemLastTime --- boolean studyItemId = " + (studyItemId != null));
                             // 8. 更新数据库（调用已有服务方法）
                             studyService.updateStudyCourseItemLastTime(studyItemId, studyVideoTtime, timestamp);
                         }