Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 58be68f29b39d1e68cee15666af9a00d6ae0303ed4adae55f4ece81d49d07846:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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