Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cd333241c72ec3d2d9133bf73daf28195afaa44d2f5fffcc8056f4a273e63ce7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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