Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b94f365c75d513299399c07e9ada2faab7c6a27aa43c69c260769634a74ebd57:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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