Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 039254b05a05f0827bb36d771fc5926e73ec44d7d3daa6a7a576bb160d9176e9:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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