Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 32f9bb0bfa7d9ae42af46c33e64e7f0f1a033570d70f65200efb8d59bfeb0bae:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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