Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 92a39c89fcf4fc3595a325ceb3e0049d40cb813a4f4ef22399a3b6596f2b9833:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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