Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e02b835d3fc8ba09f085298272a3d97929b551d16212edb4d81f6a6d6a6f8ee8:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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