Restrict Automatic serial number calculation for Production order release

Hi,

I need the solution for following requirement.

Release production order(CO02) . Then go to Menu header-> Serial Numbers.

Here I am getting serial numbers automatically as the material used in production order is set for automatic serial number calculation.

But I want to restrict automatic serial number assignment based on production order type.

If order type is 'XYZ', I dont want to calculate serial numbers automatically.

Can anyone tell me how to do it?

Regards,

Manan Desai.