Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> dbced9ef152d02269b3a237d55d20c08c5852adbd9c07b17bb25c5cb6ce38d18:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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