Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 35477fbe5ce6f3641af550988d1011f52c55bd4b9126ee3c3213b50159356c4a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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