Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 06cade8561c3e9ae30906414f4a2c1ab8ffa248c0bedad308bf625fb61725a2b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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