Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2394686426c3db42444af45893338fbc23244b36a89b3838b8df1449beacc4c3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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