Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 9c0284b458ace5e29cc0d584b88c521b61d459a6a976771694b9712f853b825a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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