Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5829a50a409011d9dd4f522dcc1f8c32ee62276d4ab6085d79d42bbae8922be5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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