Agile Board owner points to incorrect username after username is changed

Summary

Customer has updated usernames for all users within their Cloud environment. User Management displays the new usernames. Customer then looks at Agile Boards and clicks on the owner of a board. The user receives an error that the username does not exist.

Environment

Cloud
Possibly Server

Steps to Reproduce

Create a user with an email address for the username
Create an Agile Board with the new user
Change the username by removing the @emaildomain from the username
Go to the All Boards page and click on the username

Expected Results

Correct information should be displayed

Actual Results

Error is received

The specified user could not be found

Workaround

It is possible to update the A0 table that holds this information.

You will need to query the A0 table that holds rapid view information: Example: AO_60DB71_RAPIDVIEW
***NOTE: This may be different in a customers instance

***NOTE: Updating the AO table did not resolve this. A full lock and reindex was run after changing one of the users.