Entrance key exchange during divorce mediation

"I want you to exchange the key to the front door."

When I asked him if he had lost it, he said he was in divorce mediation.Yesterday, it seems that the other party came in without permission while he was away and took it out.I can't sleep at night, so I'm hoping for a replacement today.

The door is a normal YKK ap aluminum door, DT36.There is a heat insulating type in stock, but there is no non-heat insulating type, so it is a core replacement work.