Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 8283fff382c17f17f7701330dbc5e55e8c669a76d5400b0c26af0d78d4c340c1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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