Request for password for my other Mac Mini. I don't have another Mac Mini.

iCloud suggestions asked for a data sync request for Health and Maps apps on my iPhone SE. I was asked to enter passwords for iCloud and second device: Mac Mini. The Mac mini password was not accepted on the phone and I was prompted to move the request to the Mac Mini. When I followed the instructions the password was rejected and I was asked to enter the password for my other Mac Mini. I don't have another Mac Mini.