Spatial Reference System not available (greyed out) when creating a KLM Mesh or a KLM Super Overlay Production

I have a project with sUAS photos and GCP's. I submitted Aerotriangulation, in the NAD83(2011) EPSG6447 projected coordinate system, with adjustment constraints on the control points only. All looks great and it is georeferenced.

My issue is when creating a KLM Mesh or a KLM Super Overlay Production. When I go to choose my Spatial Reference System, it is greyed out with WGS84 stuck in the greyed out area. I need to choose the NAD83(2011) EPSG6447 projected coordinate system, but I cannot.

If I create this production as is, it of course comes out in the wrong part of the country.

How do I get around this issue?

Thank you, Scott K.