'Service Time Blocks Disabled for This Ticket'

Question

I have received a ticket from a client who was then automatically attached to an office that no longer exists, that had no service time.

and this message then appears below the Company Name/ location when I set it correctly-

So I have 2 problems

1. How to disable the old location? Or Should I simply delete it?

2. How to allow time blocks to be deducted. I have tried everything I can think of, but the message still appears....

Thanks

Adam