Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b19296c4e7c412636b276dd1edfdb99d8cadcee7de1b947389c868765318903a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefront:243:16