Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> eebc38004bd631939ff693ee0a03a355cda8913a48d42c15e1bf1b883f207513:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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