Sage 300

I have imported items and quantities into a Transfer from an excel spreadsheet. The Transfer then SAVES correctly within SAGE300 however, it errors out at the end of the posting process. Error reads "Transit Transfer/Receipt Detail record already exists…

Version 2014. Client receives PO into in-transit location, each receipt is a full container load of products, combined from multiple POs, and have 50-80 line items. It's a pain to transfer line by line from GIT to physical location. Is there a better…