Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4a9a765392fec4256ea385fa8799720d2060075a75e2db39bf3b1e5a3d641b9c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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