Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 32f34e5a0cb982120625b36d650d8bfc9d6a06e9ce9c5ebc85ce2184936a44f4:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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