There are 2 employees having 2 contracts for each, one running and the other expired. When I import all contracts data, these four records will be reported as failure---one employee has one contract at the same time(excluded with draft and cancelled). I adjust one to "new" status and keep the other "expired" status, importing is successful. However, what confuses me a lot is that I successfully change one's new status to running in the contract page, but the other's failed.

How should I configure to meet the needs--- one employee has more contracts, including one running and others expired?

Thank you