Someone has already added that key as an access key to a repository.

[Pradeep Gowda]

I'd like to add my public key to my account.

IFAICT, I don't have this associated with any other account (ie., personal)

[Mark C]

Hi @Pradeep Gowda,

Welcome to the community.

Do you probably recall adding it to a repository?
I believe it is referring to a repository as Access key.

Regards,
Mark C