Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c40b47926b10daeaf5f4bc1894664dfa2b48b7130bbde8816c69286ea5f7d22b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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