warning message on MRP view

Hi consultants,

I have a material that is specified as "External Procurement" Material. It is because it's a Subcon material. In line with this, a production version is maintained due to some business process requirement, which the system allows. But there is a warning message "Production versions are not required with external procurement" (Message no. M3637) that comes up everytime we click the production version in MRP 4.

Client wants to remove the message totally, how do we do this gurus?

Thanks,

Kumar