Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ffafdaa4715a1e711ed16ce222414485be84fde61ac5a19027eb3d8e83573236:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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