Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d094cd0fd4c398c9568af602a764e5ffef51e120745c260c5e868a1fad56b3d3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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