Create ERP customer hierarchy through MDG

Hello Experts

Can we create hierarchy for ERP customer (Not BP) in MDG 7.0?. We are using ERP Customer UI. The standard CR Type to create hierarchy is for BP and not for ERP customer. I tried using the same business activity for ERP customer but it won't work.

If I have to create hierarchy for customer (like hierarchy in ECC - VDH1N)  in MDG is there any way out?

Kiran