Appointments Limit Staff to 1 service at a time

[rinconvipers]

Hello, I currently have 3 staff setup where each of them are available for their own services offered to clients. However, I have another service where all three can be utilized to a client. The issue is when that option is chosen online its allowing the group service to take time slots when that staff member is already booked individually with their own person services.

Is there a way to block off a staff members schedule if they are booked individually or when in a group? Right now they are getting double booked.