Hello,
According to your description, try to delete an invalid BitLocker recovery key that is not associated with the correct computer, I consider that you may follow these steps to check:
Open the Active Directory Users and Computers (ADUC) tool on your domain controller or a computer with the Remote Server Administration Tools (RSAT) installed.
Navigate to the specific computer object in ADUC.
Right-click on the computer object and select “Properties.”
In the Properties window, go to the “BitLocker Recovery” tab.
Here, you should see a list of BitLocker recovery keys associated with the computer.
Identify the invalid recovery key that you want to delete.
Select the key and click on the “Delete” or “Remove” button (the specific wording may vary depending on your version of Windows Server).
Confirm the deletion when prompted.
By following these steps, you can remove the invalid BitLocker recovery key from the computer’s properties in ADUC.
Best Regards