Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3c14284145e9561defc718e2b513c300302d18ca19b9c50acaa80ad0d9ec5e3c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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