Blue A6 concert ticket for Derby show

I lost my blue A6 concert ticket yesterday around 7pm near the Derby Market Hall on Market Place. It's for a show at a small venue in the city; the ticket has a white event logo at the top and a barcode at the bottom that's still faint. There are two identifying marks: a torn bottom-right corner and a coffee stain along the left edge. The ticket is sentimental to me because it's for a birthday gig my sister surprised me with, and I really need it back so I can get in. If anyone found it, please drop me a message — I'd be forever grateful.