Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e4d9da285e69186a1c3b1989aa4e5060d9aa1ddc708dde5a960ab5b0b442149b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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