Don't worry about it, that's a known issue when you set up 5-point bed compensation and then you home the printer again. The message is harmless.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
