Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e5178a4b0bd0c5aa337cd7b44685f00f4fa39d443ee5a20a04091321f4f655a7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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