Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d3d1d0a4865acaa047b3efb1d5600e20cf060186c080f7f1b7f1a003fbbc6c27:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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