Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c06727063ceacc54ed40beca6525e47f1d55581c66b9b8d232b426a8fd75c40c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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