Merge Projects / prioritize one over the other

[sylarffm]

Hi,

i want to merge a few projects (all from the same landfill but taken on different days hence there are some differences in the terrain) into one, all the projects have multiple GCPS. When i merge them i want to take the newest project as baseline and only add points where there are none in the same X and Z coordinate(and on the whole Y-Axis).
But when i try to merge the projects photoscan overrides the points from the newest project with a lot from the older projects which isn't something i want.
Is there any way to prioritize one project so that photoscan only adds points from the others when there are absolutely none on the same XZ coordinate even if the points from the other projects are higher or lower on the Y-Axis?

Aprreciate the help

[sylarffm]

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