Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 99c65fff85380457d0d3245d510cb1c948fb84f1ad1d21a335de80837181e496:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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