Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e38ed07ed77e94a36e417b9e32e7e0b742baa801b29b5ab75e024b315773e48b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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