Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2d4133f2dae9102ca3afe44e7d2c14fec05039527d5d8f8ab7d34da5185b371b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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