Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 24d3cf247b185730e042b746dcd0071d8e210b0daab6e726a72b4ceb432a728f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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