Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c62fb12d45a61af3f51dd9e5b0176fad31e5828fcc8285988c7af89eeb1c50d7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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