Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 572a06b6c2407e33a30b053ea0ff803b02ea5131bce0c0186ebc1f0118c59459:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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