Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d5328112f107cfe3042b792a8aa0d43b732e215ff63e2b9aa1ff57cf43f5d413:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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