Relocate error "Sound Library files exist here"
I've just ran a clean install of Mojave.
I already had relocated my Logic X 10.4.2 sound library files in High Sierra to an external drive.
When I open Logic on the Mojave install and try to point Logic at the already relocated sound files (so I don't have to spend the next 3 hours downloading them all again) I can not select the drive. It is greyed out with "Sound Library files exist here" as the status. I know they exist there, which is why I want Logic to use that location.
Any thoughts on how to work around this?
Logic Pro X, macOS Mojave (10.14)