Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0c0eac26c293754629668524e83bfd2b783d9ce67fdd9213e575b69ae7f40fe0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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