SAP Message 88031 - Discount in %: condition master records price list have changed

Diagnosis
Within the validity period of this price list the percentages of the
heading conditions in the customizing have changed.

System Response
The calculaton of the discount to a declaration may be incorrect.

Procedure
Please adapt the valitiy periods of the conditions concerned
if necessary. Then adjust the validity period of this price list
to the validity period of the heading condition and select a
calculated condition using the input help.