批量复制单号为空bug修改

blade-service/blade-los/src/main/java/org/springblade/los/business/sea/service/impl/BillsServiceImpl.java

@@ -3861,7 +3861,6 @@ public class BillsServiceImpl extends ServiceImpl<BillsMapper, Bills> implements
 				copyBills.setAccDeptName(dept.getDeptName());
 			}
 
-			copyBills.setBillNo("");
 			copyBills.setMblno("");
 			copyBills.setHblno("");
 			copyBills.setRefno("");