Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ba5be15a701567d474754b58a5df0e424236108f824f1ab1ef236243f7f4c574:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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