Edit Attributes on Multiple Documents - checkin with same file PDM 9.1

I have multiple documents I'm trying to edit attributes. When I select them in the library, I choose Edit>Edit Multiple Objects. I can change the attribute value in the table. I changed my table view to see columns with my custom attributes. When I save or select Check In, I get the "Required information is missing", Indicating the required fields are missing. But I've selected to "Keep existing primary file". I'm just editing the attributes. But it seems like it wants me to Browse for the file to replace. Is there a solution to this? I don't need to replace the file.