Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f7819bd7932fbdb21567e5fda9a8d80a5485373ca089d1e97d5bd82ce2c7dcbd:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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