Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 6210b1d76a9cf5ad347e7df927ccfc4719a8c0471a267913841f2ca4950edd92:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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