Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> adc57e4c6b195878210c1c14d2dabede72c9c36aa4225a0393e7db886baf3979:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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