Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 05f701323266782ba3e9a4d281cf3ed33f4be5beac7a379831753953e4594fcd:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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