Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 40d118ad47f8ed6a405be7ea0fd05e340ea0ef55662ff1921e8ce9e5359194be:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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