Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0cc1825bfc806631640b54628c85d704bd63accb102760ef1ed6f78678b51221:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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