Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0daef486805cb400c17884cb20a8944d2a0cd3cdad8306f913e83d10362d5f60:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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