Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> afcd615f2af6980d394a511cd114027656b1b4524901a47bfb84d42d3509b6b1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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