Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fea1c3ba1a5d90e396943f58eb127d092f9a11ecd743d31d432abffabf9f48a6:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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