Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d05b143637efa598eb836d6c5ee723aedd95a74c9360e1ed7c26c28e405776bb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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