Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 062962fdd7a7331a5c5018e543a09c1bd46d338ec316d21cbb4e5982471abebd:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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