Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 38efc7521f0b2f55eff8ed068fb57dd85b49d1506a44501f17ec9a90038e6eaa:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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