Large offset values for compass

I am using Pixhawk from the chinise company Holybro.

for the external compass which is always automaticaly assigned by the pixhak as compass1 I get very high offset values:
like. x -344 y-98 z 155

I changed yaw to 90° 270° and none

The large offsets do not change, only the values move to Y and x

When I want to start the copter it goes to one side and I have not the guts to give full throttle.

First time flying and I am a beginner never ever had a RC in my hand.

maybe you can advice


PS:second compass has normal offset values as far as I can judge (20)