Unexpected error when updating calendar event after key rotation

[bedhub]

When updating an event (only change the title, not the time) i always receive an unexpected error message. See stack trace below.

It only happens for after rotating the calendar group key.

To reproduce

• Rotate calendar group key
• Create a new event
• Update the event title -> Error message appears when saving event.

from main_tutanota.log

2024-08-30T12:09:27.375Z I "removed topmost modal component"
2024-08-30T12:09:27.577Z I "error",Error,"Error: AssertNotNull failed : null\n    at h (asset://app/common-min-DhMq71QS.js:1:14220)\n    at Vo (asset://app/worker.js:18:39198)\n    at qo.encryptAndMapToLiteral (asset://app/worker.js:18:38309)\n    at Fs.update (asset://app/worker.js:1:29616)\n    at async CalendarFacade.updateCalendarEvent (asset://app/worker-lazy-1FQOS-ie.js:1:52192)"

from worker_tutanota.log

2024-08-30T12:09:21.000Z I "CalendarEvent list LjFiq1L--R-1 has 6 events"
2024-08-30T12:09:21.005Z I "CalendarEvent list O5Y78ZF--7-9 has 59 events"
2024-08-30T12:09:21.006Z I "CalendarEvent list O5Y78ZF--3-9 has 0 events"
2024-08-30T12:09:26.486Z I "failed to resolve session key",CryptoError
 Error message: invalid mac
2024-08-30T12:09:26.486Z I "could not resolve session key for instance of type tutanota/CalendarEvent"

Error message:
AssertNotNull failed : null
Stacktrace:
Error: AssertNotNull failed : null
    at h (asset://app/common-min-DhMq71QS.js:1:14220)
    at Vo (asset://app/worker.js:18:39198)
    at qo.encryptAndMapToLiteral (asset://app/worker.js:18:38309)
    at Fs.update (asset://app/worker.js:1:29616)
    at async CalendarFacade.updateCalendarEvent (asset://app/worker-lazy-1FQOS-ie.js:1:52192)
App version:
242.240821.0
Client type:
Linux
Additional info:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) tutanota-desktop/242.240821.0 Chrome/126.0.6478.185 Electron/31.3.1 Safari/537.36