SAP Message V1888 - You cannot change order type &2 after you've pressed

Diagnosis
You have changed the order type from &V1& to &V2&. If you confirm thismessage with , you can't undo the change to the order typebecause order type &V1& has not been maintained as an alternative ordertype for &V2& in Customizing.

Procedure
If you want to change the order type to &V2&, choose . If youdon't, select the original order type &V1&.