Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4047d83ef1c6d61af8bd2c7828109c35e924a54b4afdd8124be95010e37ad06d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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