Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fd257561279ef4a7f10143372da7506a61e123257c54a9588474ed21dcb5b508:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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