Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 38ac14e50de4df6e56f8a75a2d3ff8be2b722d6c952257189a6f62b19d2b226a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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