VeloceRF problem in Cadence

I was able to build a spiral coil using VeloceRF's Inductor->Spiral Wizard, and then there's no problem running simulation on this coil from VeloceRF, since it's a basically PCell. Now I flatten this coil, and then regroup all layers again using Make Cell command, then VeloceRF will not be able to recognize this new coil. How to fix this? The reason I'm doing this is because I need to make slight changes on the coil, which cannot be done when the VeloceRF-generated coil is as a whole PCell. Thanks for your help!