Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 92afe0ce14caede95af89e1270a75e9e65dc43b69f22230084ace90a79665932:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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