Mass upload existing Blanket Agreements lines items with Images using FBDI loader

Summary

How to Mass upload existing Blanket Agreements lines items with Images using FBDI loader

Content

Hi, I have tried amending the BPA using standard FBDI loader file. But it seems I cannot amend the line with images. If I assign Update in the Action button, it comes up with error saying attribute value is in-correct. If I assign ADD in the Action button at the line level, it says line already exists. Is mass uploading existing Blanket Agreements lines items with Images using FBDI loader not possible currently? Ihave attached the FBDI loader which I am using.

Thanks

Anurag