My client is using manual condition type for the basic price "ZBPR". Now system allowing multiple entry against this condition type in the pricing screen during order creation i.e in the first line if we put ZBPR 00 , in the second line system allowing to put another value against same ZBPR say for example 2000 & doing all subsequent calculations on the basis of 3000 .which is not at all acceptable by my client .Please suggest how to stop this multiple entry against same condition type