Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cb258ba3fd2ce89fd052d4e9b95e05384b4678428310ae23e1825e49e575e156:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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