Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e386f62a87257a9d0d025d57cb7921bb1bdb027eb78f362c6710b9e190c3ccdb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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