Masking View / Storage Group / Common Thin-Devices

Hello,

There are two masking Views named as MV1 and MV2.

     --> MV1 contains SG1, IG1 and PG

MV1 and MV2 have two separate storage group named as SG1(in MV1) and SG2(in MV2).

     --> SG1 contains dev1, dev2, dev3

These masking views have different initiator groups IG1(in MV1) and IG2 (in MV2).

     --> IG1 contains h1, h2, h3

same port group (PG) is added to both the masking views (MV1 & MV2)

Storage groups SG1 and SG2 have few devices(dev1, dev2, dev3) in common. So, dev1, dev2, dev3 are in both the storage groups SG1 & SG2.

What I need to acheive:

     --> I need to unmask dev1, dev2, dev3 from h1, h2, h3

     --> I dont want disruption or affect to the host access in MV2 in any case. Since these are common devices.

     --> If I delete MV1 then would it affect MV2 host and LUN access in case manner ???

     --> Should I just remove dev1, dev2, dev3 from SG1 and then delete the SG1 ????