Cannot enable Use Dims as Columns in Config Worksheet for Package using table 5720 (Manufacturer)

LMess2009

In Nav2018 I am trying to import my manufacturer file with shortcut dimensions. Normally to do this I select Use Dims as Columns and it adds the dimensions as columns to my template. However, for table 5720 (Manufacturer) it tells me I cannot do this. Any idea why? I know I can load them separately but I would like to avoid that if possible.

Any feedback would be greatly appreciated.

Thanks!