Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cc9f1fc2c8a522b5ac61129ad8ba74fd51235224c7654388ae2d115b13d9624c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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