Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cdbaf20eed3a17a1dd5fbe7124d6b0d13ed7c725463acda04a8d344a56fe01f6:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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