3509294 - Invoice failing with the error as Invoice attachment content ID is in incorrect format

I am a buyer receiving an invoice with an attachment in my ERP system and getting error as Invoice attachment content ID is in incorrect format.

Upon checking the inbound and outbound payloads in SAP Integration Suite, Managed Gateway for Spend Management and SAP Business Network, I can confirm the Content-ID value is originating from SAP Business Network.

Invoice attachment, content id, incorrect format, mime attachment, cxml invoice, attachment validation, invoice error, content ID,cXML integration, supplier external portal,supplier external system , KBA , SBN-AN-TX-INV , Transaction (Invoicing) , BNS-ARI-CI-SUP-AN , Managed Gateway for Business Network Sell Side , Problem