Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> dcb5e08d11f8e9a76b41a6e1f8183b26f4b710cbd5634d25c09317949659aeac:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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