Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 09ffaa04e918576e3eb81aa1738561c772957b99ef0d02e013007901174c055f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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