Nozzle not correct before printing ,please re slice

I have started getting this message before every print now ,

Incorrect nozzle please re slice and try again

nothings changed i use the standard nozzle .4 vetting prints ok but not sure why this message has come up

I have just moved printer ,so am running a full calibration before I update the new firmware .

Any ideas why ?

I even get it when printing the benchy on internal

Memory that came With printer . I have printed hundreds of these without this message ?

Cheers