Can't save updates to my products

-- url of the page with the problem -- : www.astrofactors.com
-- HikaShop version -- : current
-- Joomla version -- : current
-- Error-message(debug-mod must be tuned on) -- : Error
Please complete the UPC/GTIN field

Please complete the MPN field

Error Saving

I tried to add MPN code to one of my products, so that I could upload to Google. You system would not let me unless I also had a UPC. None of my products have UPC codes. I was unable to save the MPN code. Since I tried, it now won't let me update any products, and I get the above mentioned error. There appears to be a bug!!!!

First things first How do I clear this error, Right now!!!

Second, How do I enter a MPN without a UPC???

Thanks Bruce

Problem fixed! My web support had flipped a required field option on, unbeknownst to me.... Bruce