vCenter 6 service crashes when attempting to add DVS portgroup

Hey guys I am on vCenter 6.0 Update 1. Problem is every time I attempt to make a new DVS port group in my vCenter, the service hard crashes.

The message it throws right before the service dies is:

A general system error occurred: Error[VdbODBCError] (-1) "ODBC error: (23505) - ERROR: duplicate key value violates unique constraint "pk_vpx_dvport_membership

Any ideas? I really need to add a port group.