Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2b1da410da852367bd127bd9191a1c990d7a4c419203bf2d827494e0c56d7552:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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