HTTP 400 Bad Request errors when trying to sign off on an already signed off event
Sentry Issue: GWCELERY-V9
HTTPError: 400 Client Error: Bad Request for url: https://gracedb-playground.ligo.org/api/superevents/MS200221i/signoffs/
(6 additional frame(s) were not displayed)
...
File "requests/sessions.py", line 530, in request
resp = self.send(prep, **send_kwargs)
File "requests/sessions.py", line 650, in send
r = dispatch_hook('response', hooks, r, **kwargs)
File "requests/hooks.py", line 31, in dispatch_hook
_hook_data = hook(hook_data, **kwargs)
File "requests_gracedb/errors.py", line 3, in _hook_raise_errors
response.raise_for_status()
File "requests/models.py", line 941, in raise_for_status
raise HTTPError(http_error_msg, response=self)