Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 022b57a1570cafaba6556553e100473e46d806e8aa7468b4cfe83d1fa1cce490:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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