fix

@@ -129,6 +129,7 @@ public class DinerServiceImpl implements DinerService {
                 .setShouldUpdateClientId(true).setClientId(singleClientRpcResponse.getId())
                 .setShouldUpdateClassId(updateDinerDTO.getClassId() != null).setClassId(updateDinerDTO.getClassId() == null ? diner.getClassId() : updateDinerDTO.getClassId())
                 .setShouldUpdateName(updateDinerDTO.getName() != null).setName(updateDinerDTO.getName() == null ? diner.getName() : updateDinerDTO.getName())
+                .setShouldUpdateStudentNo(updateDinerDTO.getStudentNo() != null).setStudentNo(updateDinerDTO.getStudentNo() == null ? diner.getStudentNo() : updateDinerDTO.getStudentNo())
                 .build());
     }