Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c56a24b26e7ebec1261df64ab09db73985989c5ccfd89a27d4d810181e3aa87a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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