Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a46e3c9d5149ffe816a3c72f798853c97b8b28af1141f8f66b80e85c481a6684:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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