Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 8862380c6a1c0aaf59e7771596468698925a0a1752ee86be8624e09d37944f5a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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