Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 09f581d671fd06e5bb513de1c860d3b7fbcced2eb74aed5cd2bd265d74db35f5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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