Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 58467f05fe78df5c1c7c328a0beb74ea215e5694d68ca1536bbd5851f33c022c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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