Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1e6afade53374507626cf8b6e9b1a78520a36939afecd3f8021d6f9a592572a3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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