diff --git a/src/main/java/com/peanut/modules/medical/service/impl/CourseServiceImpl.java b/src/main/java/com/peanut/modules/medical/service/impl/CourseServiceImpl.java
index 8b755185..b6520907 100644
--- a/src/main/java/com/peanut/modules/medical/service/impl/CourseServiceImpl.java
+++ b/src/main/java/com/peanut/modules/medical/service/impl/CourseServiceImpl.java
@@ -73,7 +73,8 @@ public class CourseServiceImpl extends ServiceImpl<CourseDao, CourseEntity> impl
     public List<CourseEntity> getUserLateCourseList(ParamTo param) {
         MPJLambdaWrapper<CourseEntity> wrapper = new MPJLambdaWrapper<>();
         wrapper.selectAll(CourseEntity.class);
-        wrapper.rightJoin(CourseToMedicine.class, CourseToMedicine::getCourseId,CourseEntity::getId);
+        wrapper.distinct();
+        wrapper.leftJoin(CourseToMedicine.class, CourseToMedicine::getCourseId,CourseEntity::getId);
         wrapper.leftJoin(UserToCourseEntity.class,UserToCourseEntity::getCourseId,CourseEntity::getId);
         wrapper.eq(UserToCourseEntity::getUserId,param.getId());
         wrapper.orderByDesc(UserToCourseEntity::getUpdateTime);
diff --git a/src/main/java/com/peanut/modules/sociology/service/impl/CourseServiceImpl.java b/src/main/java/com/peanut/modules/sociology/service/impl/CourseServiceImpl.java
index 4c5e5921..d5b0e9c6 100644
--- a/src/main/java/com/peanut/modules/sociology/service/impl/CourseServiceImpl.java
+++ b/src/main/java/com/peanut/modules/sociology/service/impl/CourseServiceImpl.java
@@ -92,6 +92,7 @@ public class CourseServiceImpl extends ServiceImpl<CourseDao, CourseEntity> impl
     public List<CourseEntity> getUserLateCourseList(ParamTo param) {
         MPJLambdaWrapper<CourseEntity> wrapper = new MPJLambdaWrapper<>();
         wrapper.selectAll(CourseEntity.class);
+        wrapper.distinct();
         wrapper.leftJoin(UserToCourseEntity.class,UserToCourseEntity::getCourseId,CourseEntity::getId);
         wrapper.eq(UserToCourseEntity::getUserId,param.getId());
         wrapper.orderByDesc(UserToCourseEntity::getUpdateTime);