Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e5427e8615106f3aa43f95c8b1a1bb6f17879f589226c2237cd306fdd2fab5c1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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