Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0eda827d2e93b1599ea5e6b31a71f5dd1ed41b3d90350080bc834609fdb937e8:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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