2820058 - Idoc Field FIIKONTO not getting updated

Hello Team,We are facing an issue with a value of field FIIKONTO - Account Number while generating an idoc of type PEXR2002.This idoc is  getting generated while executing a payment run for an IHC payment scenario.This payment run creates an idoc as a payment order and send the instruction to the other SAP ECC System (LXQ-400) for actual payment.The same scenario when executed in the development system works fine, but the issue is with the quality system.Attaching herewith the attached detailed document to explain the issue with screenshots.Kindly request to look into this and share the results. 

KBA , FI-AP-AP-B , Payment Progam / Payment transfer (DE, JP, US) , Problem