Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 8d9562346b81966c83d5c0ab28d495809174b435d303b4eaa1f8655c3dc27ea0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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