How to Delink the VC material and the Material Variant

Hi Experts,

My Requirement is to remove the VC material details from the Material Variant(MV) Material Master.

The field in the MV is grey out.I am not able to change that.Is there any correction report available.

I have tried by using the Change Number and Delink the BOM with VC material.(CS41).Even though I am not able to change that.

or I need to go with the new Material code only.

Please give your valuable inputs.

Thanks in advance.

Best Regards

Saravanan S