Your points need to be global only, they can't have local coordinates on them as well.

Export them as "Custom P,L,L,h,Code (Global)" and reimport them.
This way you should be able to get rid of the local component.
I also rename those points to "*-GPS" before importing them. Makes it easier to separate local and global points.
From my point of view it is a bug that the site calibration does not except any point that is in the project that does have a valid global coordinate.