Irrespective of the PO document type system defaults the Excise Material type in MIGO Item details under Excise tab based on J1ID settings (Material & Chapter Id Combination).
In Standard, if there is already defaulted Excise Material type and if you change it, system gives you a Warning Message. This is not a Configurable Message.
You may check with ABAP team if you can populate the same message as an Error message using User exit.
For your requirement check User exit J_1I7_USEREXIT_MAT_IND serves your requirement.