Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> aabd00271ac6c690b6fcbcb23be16ca03dd4e3264e77dbef310e0f32722f3f82:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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