Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e6d035450030afc53892ffe8e465d66d84276ffff1d8fdbb413df4c44573ac6f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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