Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3a126ca612a94e0adfa06735add194836856a87d839c0f36cc209d00616d561a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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