Once the bait has been eaten, server.world.get_object() will return None for bait, so bait.id won't work. But you don't need to check for bait.id, as you already have self.bait_id.
Just to be safe you should also check if bait is not None before the loop which iterates over bait.contains, and also check both hook_id and hook, as those calls are not guaranteed to succeed.
With the latest code you just pushed, the Fishing task crashed, but I was able to confirm that the hook is object is inside a fish now, and the bait was eaten. What happened for you when you tried the code? Did you get the task crashing in the same place?
Ok, the code looks better, but still has issues:
Once the bait has been eaten, server. world.get_ object( ) will return None for bait, so bait.id won't work. But you don't need to check for bait.id, as you already have self.bait_id.
Just to be safe you should also check if bait is not None before the loop which iterates over bait.contains, and also check both hook_id and hook, as those calls are not guaranteed to succeed.
With the latest code you just pushed, the Fishing task crashed, but I was able to confirm that the hook is object is inside a fish now, and the bait was eaten. What happened for you when you tried the code? Did you get the task crashing in the same place?