Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 26586e38b82912164a130c06a990eabc0408ae36bf83b641b3e22ca2a1606a5c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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