@GratefulAbyss37
What you are seeing is a warning, not an error.
Somewhere, either in your config.g or in another file, there is a call to G29 which loads a bed height compensation map.
https://docs.duet3d.com/en/User_manual/Reference/Gcodes#g29-mesh-bed-probe

This should only be done AFTER homing the Z axis ( G28 ) so that a zero reference point has been properly established.

Search your files and remove the G29.

In general, when asking for help you should post your config.g and any other files which might relate such as homeall.g and homez.g

https://forum.duet3d.com/topic/5909/guide-for-posting-requests-for-help/10