Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fe66145e182dea2cfeeec91cf5b9ae48380a98546cbfd940e752a68a8d53e559:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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