Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
That indicates there was previously a volume licence version of Office installed on your PC.
Please follow these steps carefully.
Click your Start Button, type regedit and hit Enter to open the Registry Editor.
Click View and make sure 'Address Bar' is turned on.
Paste this into the Address Bar at the top and hit Enter.
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Office\16.0\Common
In left pane of the registry editor, expand the Common folder, there should be a sub folder named OfficeUpdate
Right click and delete the OfficeUpdate Key
Close the registry editor and restart (not shut down) your PC to apply the change.