Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cab52ad913a1acaf1361923e7d76be39fe963ac53cc464b27a71f65c851d2234:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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