Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> dc932f5e889b6619d44746a3d5dce46953fde5728810c1cdceced6c1b2462876:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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