Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cea1deee3a70fd1bae03fa0966d3260726e78c785bfe55b7d9109d7ad0c747a8:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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