Currently in some Project Online tenants (I can just speak from my demo environments) it is not possible to set back a value from a selected lookup table by just deleting the entry, e.g. if you select an item from any project or resource field with a lookup table in the project web app, and you want to set back the value to no entry. In Project Server it was totally fine to use the keyboard, but it seems that within the online scenario this is not possible anymore. Since I have almost broke my fingers by pressing any key on my board again and again, here’s the solution how to remove the selected value from the initial choice:
You just need to select the same value from the lookup table again!
Simple, but unfortunately anything but intuitive to handle… 😉by