Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3aa10101928eaa8f6cb90e91e422b31d265290a4fae8a9d5b16f3ee25c45aafe:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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