PHP Error code

Hi, I am getting this php error:

[02-Dec-2022 03:02:03 UTC] Cron unschedule event error for hook: wcsc_event_start, Error code: could_not_set, Error message: The cron event list could not be saved., Data: {“schedule”:false,”args”:[]}
[02-Dec-2022 04:51:04 UTC] Cron unschedule event error for hook: wcsc_event_start, Error code: could_not_set, Error message: The cron event list could not be saved., Data: {“schedule”:false,”args”:[]}