Royal Skies' Full Blenda (Can't Edit Driven Number Value)

I have been watching Royal Skies’ videos on character creation and he has given us a full character to work with. But I cant seem to get the face drivers to work, they have values from 0-1 and when I try to use them, blender says, “can’t edit driven number value, see graph editor for the driver set up”. What does this mean? And how do I fix it?

If the shape key is purple, then it is driven by a bone (most likely), so you won’t be able to activate it manually.

How would you fix this or change it then.

Save a version of the model just in case this isn’t what you want, then right click on the purple shape key, and select “delete driver”.