VxRail expansion with 6 uplinks for VDS

I'm trying to expand a cluster with two new nodes.  The existing cluster's nodes each have 6 x 10G uplinks.  I've got 6 x 10G uplinks on the new nodes as well.

When I validate in the "Add nodes" wizard, I'm getting a message of

"The size of the nic_mappings should be either 2 or 4 for each VDS"

I'm thinking that the system wants only 4 uplinks?  Should I remove 2 uplinks on the existing nodes and new nodes?  The system has been running well for a couple of years - I hate to mess with it.

Thanks for any advice.