Cause
When deleting a recurring appointment, theearliestDeletionDate field must specify a date in the future. This date determines which appointments in the recurring series will be deleted. Appointments scheduled before the earliestDeletionDate will be preserved, while appointments on or after this date will be deleted.
Fix
To delete a recurring appointment: - Specify anearliestDeletionDate that is in the future - Ensure the date is formatted correctly as an ISO 8601 date (YYYY-MM-DD) - Consider which appointments you want to preserve and which you want to delete when choosing the date If you want to delete all future appointments: - Set the earliestDeletionDate to tomorrow’s date or the next scheduled appointment date.