Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e3ccc51e8a2adaa2ae27c295a18f19c946c68a5b79dca9edbb8b842b12938eb1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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