Daylight sensor: cannot change sunset offset

tried to update the config for my daylight sensor sending a PUT to …/sensors/1/config with the following body:

{ "sunsetoffset": -60 }

While I got a 200 response from the server, the API itself replied like this:

{ "error": { "address": "/sensors/1/config/sunsetoffset", "description": "Could not set attribute", "type": 608 } }

How can I change my sunset offset, if this is not the correct way?

I also have the problem, but it has existed since I updated to version 2.12.06. After a downgrade to version 2.11.05 it is possible again to set the offset for sunrise and sunset. For me this is an acceptable solution for the time being.

The parameter is per API documentation not supposed to be changable.