MCode Mixed Error message with Valueline TY DVD-R media

I'm using Valueline Taiyo Yuden DVD-R media, and prior to duplication I keep receiving an MCode Mixed error message

Valueline Taiyo Yuden DVD-R media can have a mix of 8x and 16x DVD-R media in a single pack. Your duplicator works best when all media being used is the same. If you receive the MCode error it means that the media in the duplicator is mismatched. Please check that the media in the duplicator is the same by using the Disc Info function and replace any mismatched media as necessary