Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 05dcc0fa9d46ab66345f3efd987c505b97ce4504a80ab564cbcfc5f154eccd54:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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