Change Default Value of Material Custom Property in Weldment Cut List

Currently, when creating weldment cut-lists, the default material value is linked to the assigned material ("MATERIAL@@@@".  I'd like to change the default so that it is not linked to the integrated material feature in SolidWorks (i.e. just use a text string as the default).  Is there a way to change this?

SolidworksWeldments