Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d8602b3422736291a13b9bec3807a9ebc9ae0bd451e9b628bcc0d78909940a28:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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