Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e5c48f4c97223d8acbbc09ea58ddc93b1b7198036f65d5d49849fdb00489c2ee:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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