Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 05189f6513f48c3a2d29c2b8d76975c62736eb83e6e65df2a31f5965727fb7c6:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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