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 9eaffc1c..b1e2beaa 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
@@ -149,8 +149,10 @@ public class StudyCourseTask {
                         }
                         // 8. 更新数据库（调用已有服务方法）
                         studyService.newAppendStudyDuration(studyId,null,courseContentId,appendtime,timestamp);
-                        // 8. 更新数据库（调用已有服务方法）
-                        studyService.updateStudyCourseItemLastTime(studyItemId, studyVideoTtime, timestamp);
+                        if (studyItemId != null){
+                            // 8. 更新数据库（调用已有服务方法）
+                            studyService.updateStudyCourseItemLastTime(studyItemId, studyVideoTtime, timestamp);
+                        }
                         List<StudyCourse> allUserList = thirdApi.getStudyCourseList(studyId , courseId, null);
                         log.info("处理成功 allUserList: {}", allUserList);
                         // 9. 删除Redis键（原子操作）