How to disassociate a Civil 3D drawing file from OpenGround project?

I am in the process of a creating a Civil 3D template file for my company's geotechnical modeling use. I have connected to a random project within our OpenGround database so that I have some actual data to work with when creating various styles configuring settings for the template. The issue I am running into is that I cannot seem to disassociate the file from the test project. I feel like I have tried everything, including wiping the drawing completely (which seems like a mistake, because now I can't even get the test project data to come back).  Is there some sort of database connection running in the background that I don't have access to? Please help. 

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