Schedule overrides were not editable/deletable

This incident has been resolved.

Between 2022-10-20 14:23 (UTC) and 2022-10-20 17:39 (UTC), due to latency in Opsgenie system, we were not allowing any edit or delete for schedule overrides and returning error to some of our users. After detecting the problem, our engineering team worked towards getting Opsgenie service back up as quickly as possible.