Item &1: Error during manual entry / change of condition &2

Message type: E = Error

Message class: V2 - Kopierfunktionen der Verkaufsbelegbearbeitung

Message number: 131

Message text: Item &1: Error during manual entry / change of condition &2



What causes this issue?

The system recognized some incorrect data when it checked the condition
(condition type/amount/currency) you entered or changed manually. it
could be that the system does not allow manual changes to this
condition.

Error message extract from SAP system. Copyright SAP SE.