3763419 - Incorrect installment sent via messaging after MIRO installment change

In an SAP Business Network/Ariba Network scenario integrated with SAP ERP or SAP S/4HANA through SAP Integration Suite and Managed Gateway for Spend Management, when a specific installment of a multi-installment invoice is changed in the ERP system using T-code FBL1N or FB02, the subsequent Payment Proposal update sent to the SAP Business Network via ISMG corresponds to an incorrect installment. For example, if installment number three is modified, the system sends an update message referring to installment number four. This leads to a mismatch between the ERP and the Business Network, because the change is applied to an incorrect installment.

[Change Request ID: IG-55636] , KBA , BNS-ARI-CI-AN-PPR , Managed Gateway for Business Network - Pay.Prposal , Known Error