Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ea2641d0618c3d5f4a85abea5fdfab84c9f040152a4661c7e8b0814f9abd8fdb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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