"error": {
"errors": [ { "domain": "calendar", "reason": "fullSyncRequired", "message": "Sync token is no longer valid, a full sync is required.", "locationType": "parameter", "location": "syncToken" } ],
"code": 410,
"message": "Sync token is no longer valid, a full sync is required."
}
Before we implement the fix that can refresh the sync token internally, you can perform the following procedures (don't have to clear your DB) to refresh the sync token manually.
Login in to HomeApp
Launch Personiuim Calendar
Ignore and close the Error dialog
Open the Account page from the side menu
Click Edit and then delete the Gmail account
Click Add another account to re-add the Gmail account
API
Error message
How to reproduce
Modify the sync token to make it invalid.