Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 82fe80767d6e07c04f9b4c27304f9b56f69a241b7499024d33caecb27c72e9fb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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