Old passcode

Hi, has anyone encountered an issue with an "old passcode" in resetting/erasing iPhone 13 Max Pro? It's a never-ending story. Some time ago, my device started asking me for the old passcode, but I was ignoring it/postponing it for later. Then, I forgot my "new/current" passcode. After several attempts, the phone went to restore mode. I erased the phone, providing my Apple ID, but then I lost my mind. I don't have any other iPhone and I definitely don't remember the previous one. See the pic attached. Please help.