Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 57e85507773a8b79245617a9139ba6f4f5f2e4c0305ff354be7802dc1d46158f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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