Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5d1f8e9a3785a3651aad573a43cfc5932eb4a9c3740a00bea74226e65e36e828:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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