"Please complete the Pattern field" error Category

Hi there,

I am getting a really odd error when I try to add a new Category in Hikashop. I click New, try to enter a name for the category, but when I try to save, I get the error "Please complete the Pattern field". I don't see Pattern in the Help docs, and it doesn't appear on another site where I've installed the same version of Hikashop. Please let me know if you need credentials to my backend and I'll send it through the Contact form. Thank you!

-- url of the page with the problem -- : textilesamano.com/
-- HikaShop version -- : 2.2.3
-- Joomla version -- : 2.5.11
-- Browser(s) name and version -- : Chrome
-- Error-message(debug-mod must be tuned on) -- : Please complete the Pattern field

Thanks, Nicolas! I had created it so long ago that I'd forgotten about it. Thanks for clearing up the mystery, cheers,

Tamara