If the platform stops you from editing part of a job, it is usually because the workflow has moved beyond open listing mode and into bid protection or booking protection.
1Bids need a stable job to price against
Carriers are bidding against the details they can see. Once the listing has active bids, the platform cannot treat every later change as harmless. At some point, the system has to protect the integrity of the bidding process.
2Accepted and confirmed bookings are even more protected
After a bid has been accepted, and especially after the deposit has been paid, the job is no longer just a listing. It is becoming a real booking. That is why some changes are blocked completely once the booking has been confirmed.
3What to do instead
If you cannot make a change through the edit flow, check whether the correct route is to update the booking through the current job workflow, change the accepted bid before deposit payment, or contact support if the situation is unusual.