Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 33a0946471b76b82127a0791b0113d6d22a7c330b347656ceed87155c109286e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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