Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c08fbb072142290a67e71ad2360a0bd9b598b659ab2328cc9d7f44fc459c9e69:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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