VSS-Control Volume error

We have an Equallogic PS6110 that is being used by two clustered SQL servers, running 2012 R2.  I'm seeing a lot of "iSCSI login error 0x490 when connecting to vss-control volume for group xxx.xxx.xxx.xxx", when I look on the GM, this isn't configured for any access.  I didn't set these up so I'm not sure why this is the case.  However these servers are also being backed up by a different backup solution, so I'm a little leery of fixing this by enabling access on the SAN.  Is there anyway in the Auto-Snap manager I can keep it from trying to access the VDS/VSS on the san?  Or would I be better off to just enable basic access and see what happens?