Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f5ce19d8a79f597250349ea94c76e2cd1671bfeb7cffa5e1e321efb08dd05eb9:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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