Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d746c38be9db44ae8eee374e52ca0ed2f405da3ce8acf56ba329a255b3e00f18:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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