Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> dda72faaddf568a77ae033618ca3012deebc6a26f7a82beb0c46784fb2570a7e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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