Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 9bf05175210b6d57a21dc52a5288d3065f6be1855a6d8a50b159e92b0de3bce5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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