ZHA Thermostat (Moes BHT-002GCLZB alias TS0601 _TZE200_aoclfnxz) local_temp_calibration

Hi,
has anyone an idea how to set the local_temp_calibration via zha?
Problem: The temperatur from my Moes BHT-002GCLZB alias TS0601 _TZE200_aoclfnxz is about 2.5 C° to high. With other sensors (like esphome sensors) I have the same problem. But there I set an offset from -2.5 and then it is okay.
The zha quirks “electric_heating.MoesBHT” shows under MoesBHTThermostat (Endpoint id:1, Id: 0x0201) cluster management the attribute local_temp_calibration (id: 0x0010).
But I can’t set the attribute. Try to write -2.5 it shows an error that the value must higher than 0 and try to write 2.5 or 2 or 250 (for tests) I get “ERROR (MainThread) [zigpy.zcl] [0x650f:1:0x0201] invalid literal for int() with base 10: 'None'” in the log.

Has anyone an idea howto set this attribute over zha?

Thanks Ben