Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a401deb89a2bc24dd9941e1e2a54222817a4d452843dfeccbdf5e2d59cebf21a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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