Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5dc53df9ea62c8704d4902343aadd2349d0f09b2d0aaa0a06f098f0babc635fd:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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