Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 41d64ed39e916da01d7a910213e9801790125700db82d9c580b1fdf65d5eb1ca:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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