Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1feb00e42e97b27e22b747fda6339cba3ecd4afd08c47c1dd0c3db15f207e91f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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