Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> bb6356397591e2599c366f69e2453ba0271364e116be697cc7d90b150a039ff0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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