Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f65e54781ea88b08ece98e8e37042a73d41a589e61c2fb7342cf64f80b2afec7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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