HOW TO FIX PROBLEM WITH CITI CARDS AND CITIBANK ACCOUNTS COMINGLING

I did an update of the credit card transactions and selected both accounts. One updated fine and the other one didnt….said there was a problem.

so under accounts the account in question said no it was not setup so i edited and told it to activate but somehow when it is synching the activation to my existing account it seems to be linked to the other citi account tho the account list doesnt show this…..have tried many deactivates and resets to fix but i cant seem to get the citibank account to activate