Updating an integrated sub-project schedule in my master WBS without using Program

Hello,

I built a Project Master WBS and integrated several P6 schedules into it. GC Construction schedule → Cx schedule → Validation schedule. The logic ties between equipment and system start-up are updated. I do not want to lose the logic ties between schedules and I also want to be able to export the Project Master schedule to other stakeholders.

Question: what is the best method to update the GC Construction schedule as I get updates weekly without breaking the logic ties to the other sub-project schedules? Or having to do manual rework weekly updating the logic ties to the sub-project schedules.