Does anybody know what could be wrong? I don't see Transfer to a work account for one Apple ID account, only Keep as a personal account. I had read https://support.apple.com/en-gb/102159 and checked every option. Once I saw Transfer to a work account, but I was told to update my Mac to the latest OS. After that, I had tried many times without success. It's giving only one option: Keep as a personal account. It wouldn't be a big issue, but the problem is that this Apple ID is used for an APN certificate.

 
