...

examcloud-core-examwork-service/src/main/java/cn/com/qmth/examcloud/core/examwork/service/impl/ExamServiceImpl.java

@@ -115,6 +115,8 @@ public class ExamServiceImpl implements ExamService {
 			if (!exam.getId().equals(examInfo.getId())) {
 				throw new StatusException("E-001001", "考试名称已存在");
 			}
+		} else {
+			exam = new ExamEntity();
 		}
 
 		exam.setBeginTime(examInfo.getBeginTime());