Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e302ad936f0a93ea790eefa846b271febeaf1088a22b466c055a02a3bb4098b7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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