Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e2bbe05d7e6be6702bb6dc1b21ba21f8c765a6d6be62a0c076090893a41063fd:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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