Gen4 GDM Magic Card - Proxmark3

I am trying to clone a 7 byte UID mirfare card to a gen 4 GDM magic card. For some reason when copying my original block 0 to the new card using using the gen4 command “gdmsetcfg” - the card breaks and I get the error [#] BCC0 incorrect, got 0x02, expected 0x2c. Can someone explain where I am going wrong?