Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 7aa230a0a4b38b6a91f6849ae9c224bed483adb235b8b2223ad335a6543ede18:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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