Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4d03ebf9aed9248fb17d3c713ec2150aafa436ff8f3fe8724ccbdf590074852b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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