Account split in two when changing from samAccountName to userPrincipalName

[Mattias Kallvi]

I changed my LDAP config from samAccountName to userPrincipalName. When I did that some accounts were split into two accounts, one with the old samAccountName and one withe the userPrincipalName. The one with samAccountName is now in Jira Internal Directory and the other is LDAP.

My guess to what happend is that we used to have all our accounts in Jira internal directory (before my time). To make it easy they used the samAccountName as username. Then they activated LDAP-synk and Jira conected the Jira Internal Directory accounts to the LDAP-account since they had the same username. When I changed the username to UPN they were splitted into two different accounts.

So, to my question: How do I connect the two accounts again? Do I have to do some dark database-magic or is there a more clean alternative. Any help on this is most welcome.