Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c4a1c2e40725cdaa284ff0c7404ba4fa9de1de82202a9e1f2dfa72f1224f838d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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