After significant time researching merging items into a Project file, I've got a template put together in MS Excel to merge into MS Project. The issue I'm having is that I have several tasks linked to others in Project until another group schedules that activity. They are the user for the Excel file. At that point, I want the Predecessor field to be over-written as blank (i.e., break the link) when I import the Excel file. I've tried importing a blank Predecessor field, inserting "" into the Excel field for Predecessor, even putting in dummy text. Nothing works.

How do I break the link in a merge? Is there some other True/False field for Link I'm missing?

Thanks in advance.