Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d43bf96212fca611613db156d8df4cee26088ed2d3ca4eb03f9a4588b41ad7fc:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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