Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 24e1d2e31f1ffb19053d343e303505eda07aee2761b7c64a20bd2ca04e729b8a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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