Limit developers to specific apps

When the developer account was first set up there was one app and the developer was granted permission by the account owner to ALL APPS. But now additional apps have been added and different developers work on different apps. But they are all shown as having access to ALL APPS.

How can I give each developer access only to the specific app they are working on. Attempts to edit the permissions result in

"You cannot edit app access for 1 user. Only active users with App Manager, Developer, Marketing or Sales roles can be edited."

Do I have to delete the developer and add them back with naming only the specific apps they may access? Will I need to send the developers a new invite when I remove and add them back to the account?

Limit developers to specific apps
 
 
Q