Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3b2dfbb37166141f2f070ad83d8333d6258a6fc24144ce044e238e6f8fa244bb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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