Someone has already added that SSH key

[Wojciech Kochanowski]

When i try to add my SSH key to my account I get an error

"Someone has already added that SSH key"

How can I know what account is using this key?

[Nic Brough -Adaptavist- · Accepted solution]

Welcome to the Atlassian Community!

There's no easy way to work this out, because the keys that belong to other accounts should not be shared.

If you shared the key with someone, you should know who.  If you were given the key by someone, then you'll need to ask them.  

In both cases, you should not be sharing the key.

If you don't want to spend ages chasing down the share, then you can (and should) create a new key for your account and use that instead.