Breaking (!) API changes for v2 API, January 2 to January 9
During the week of January 2, 2026, to January 9, 2026, the mittwald API introduced several updates, including the removal of the 'readonly' enum value from the 'user/accessLevel' request property, the addition of optional properties such as 'concurrencyPolicy' and 'timeZone' across various endpoints, and the introduction of a new endpoint for listing valid time zones.