Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e9fd39c87f380e8430fd75f96593ed57c0eb3a4f8dee38486ce0399e779b4a51:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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