Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> aa9e88a7feae7212a1412aa6c9155217296dfbce884b4c6e259da66b05fe0a6c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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