Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 9d157f59550681827e0951c6c9c6f8addae75ad95edf187ea50f5c5354bbbb4b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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