Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3d850a027aee9c24c301c99d8ed0f60f8395c5c01ae2b48d44c6a263db523bcb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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