diff --git a/src/main/java/com/peanut/modules/common/controller/ClassController.java b/src/main/java/com/peanut/modules/common/controller/ClassController.java
index 0f5ba860..af80ccdf 100644
--- a/src/main/java/com/peanut/modules/common/controller/ClassController.java
+++ b/src/main/java/com/peanut/modules/common/controller/ClassController.java
@@ -432,6 +432,8 @@ public class ClassController {
                 userCertificate.setCertificateUrl(url);
                 userCertificate.setCourseId(courseEntity.getId());
                 userCertificateService.save(userCertificate);
+                //解锁
+                redisTemplate.delete("lock");
             }else {
                 ClassEntity classEntity = classEntityService.getById(params.get("relationId").toString());
                 String startYear = DateUtil.year(classEntity.getStartTime())+"";
@@ -459,6 +461,8 @@ public class ClassController {
                     userCertificate.setCertificateUrl(url);
                     userCertificate.setClassId(classEntity.getId());
                     userCertificateService.save(userCertificate);
+                    //解锁
+                    redisTemplate.delete("lock");
                 }
             }
             return R.ok();
@@ -504,7 +508,7 @@ public class ClassController {
             }
             return res+courseNamePinyin;
         }else {
-            return "";
+            return getNextCertificateNo(type,courseNamePinyin);
         }
     }