Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d0e4158213a87e8629b63fefd35d695cdc0bb67bb951e9b88af13ab8b9037dd3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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