Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1a829bfee2396430eb4d75ff51aac1633b68ff9e40d9efa2256a43aca6102b7f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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