
Hi @Tevon2.0,
Thank you for posting in this community.
This "item has been added" issue seems to happen usually when you change the domain and then re-add the same user account.
First let's try to delete these duplicate accounts:
1.Run PowerShell
Get-SPManagedAccount
to list all the accounts, note the duplicate.
2.Run PowerShell
Remove-SPManagedAccount -Identity DOMAIN\ServiceAcct
for the account with duplicate (this will only remove one of the duplicated accounts) . If you have problems in removing the account, try restarting IIS and try to execute it again.
3.IISRESET
4.Use the account in the SharePoint Farm Administrators group to revisit the service account.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.