Unable to remove reference attributes from AR Interface

Summary

Unable to remove reference attributes from AR Interface

Content

Hi,

We are receiving Invoice and credit memos from third party billing system. The data is loaded to Fusion via FBDI templates automatically by the interface. Sometimes, the credit memos received from the billing system are pointing to invoices (reference context and attributes 1,2,3 ) which do NOT exist in Fusion application and therefore such lines do get stuck in the interface rightfully. However, if one tries to remove reference context and attributes 1,2,3 values from the AR Interface and clicks on upload button, system throws an error saying reference attribute 1,2,3 are required fields. I can confirm that attributes 1,2,3