Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 94a24fe202638074aef0b343ce7afa5f6e107220441c30ab055f3f73c53c84d9:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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