Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fa3b7a47fecc38416ddd59cfab4a37284d9580ef1f4fafcde0d693e3b7198ae5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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