Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e46b3c0a5f906cc49ce19debf5f89fdfbf78f575c97c469af45221fd6fc93ed1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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