Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d4acfd97a5e4a7320a9c1abd9b070668837f88d20848e7f773d476d0e5867ba7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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