Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1419aea4094f5909455b45ae10c25780ec7ec3c682cf5085c19e1f4ecf2b198f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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