Thank you for reaching out to us.
I see there are few QnA posts related to this issue, did you try them ?
https://learn.microsoft.com/en-us/answers/questions/611870/azure-ad-connect-sync-error-114-after-removing-ad.html
https://learn.microsoft.com/en-us/answers/questions/595446/other-error-on-azure-ad-connect-sync.html
https://learn.microsoft.com/en-us/answers/questions/680350/azure-ad-sync-error-114.html
Let me know if the steps in the above posts help you.