Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 14fe1ceb12fa95816baa14773124f098d0ed707a5e36b5d63413e203a7651258:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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