Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f7628c967aae269bafd5729c4d6c9b8e62ac5b252175f082246fc6f38a3c9c21:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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