Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 45c4759c888adb137c92a3100cb5a6b394a39668f8d25f10b81ef77b2c57790f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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