Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d350546d1f6af6575edae2925b9a3c06b76d65f04374804232d98ec6db83b9c5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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