Have you enabled Global IDs on your AP_LandUse feature class? If not, in the Catalog Pane, right-click the feature class and click manage. In the popup, click manage, then check off Global IDs.
In the picture above, I previously enabled Global IDs, so it is now locked.
I get the same exact behavior you described if I have not yet enabled this option. Esri documentation does mention you need to do this, but it does not make that clear within Pro.