You should be able to fix this with the License Removal Tool.
How to uninstall Mac Office 2019 and then install Office 365
Neil M
0
Reputation points
How do I uninstall Mac Office 2019 and then install Office 365 apps? I have a recently purchased subscription for 365 but my Mac is running Office 2019 since 2018. I followed the uninstall instructions on the support page (moved apps to trash folder, moved all the library and container objects to trash, restarted), and then downloaded apps from office.com, signed into my MSFT account, and what I had was….Mac Office 2019. For reference, I have the Microsoft 365 Family subscription.