Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> dfe37d0063159c6b70755cfd71b46f1034dc29926839b01661d23a89a300124a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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