Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1c5120e5510b3b96af5d9d969a432f2407856ed4725cd36b4d0476c8b397f2c0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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