Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3c0a3aaf3d70733d166bf03f6464d953db57983202417ffcd7f8e3aee3fe9290:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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