Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e2633813cb0abfc058825ff510032d1210d3cec2d457a84bb2e71d5ce1e5cb65:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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