update

mec-biz/src/main/java/com/ym/mec/biz/service/impl/MusicGroupServiceImpl.java

@@ -1630,7 +1630,7 @@ public class MusicGroupServiceImpl extends BaseServiceImpl<String, MusicGroup> i
                     studentRegistration.getParentsName(),studentPaymentOrder.getActualAmount());
             return true;
 		} else {
-			if (studentPaymentOrder.getBalancePaymentAmount().doubleValue() > 0) {
+			if (studentPaymentOrder.getBalancePaymentAmount() != null && studentPaymentOrder.getBalancePaymentAmount().doubleValue() > 0) {
 				sysUserCashAccountService.updateBalance(userId, studentPaymentOrder.getBalancePaymentAmount(), PlatformCashAccountDetailTypeEnum.REFUNDS,
 						"乐团续费失败");
 			}