Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b515da499a3697a6769bc3ec5236d1d3d9e7069b06d3dd3bae04dec8c84a9436:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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