Conditional Goods Movement for products with CG combination &1 and &2

What causes this issue?

Mixing explosives of Compatibility Group G with explosives of other
compatibility groups is at the discretion of the National Competent
Authority.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Please contact the responsible warehouse.

Error message extract from SAP system. Copyright SAP SE.