Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 7a411c1201729b6a181c20a08adb32ce7f30be7af0a9bea0fd782c7c087017d3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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