Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d7089126c5bc584acbf35b52c7249ccb4c10d040a8246f0fe17d4741a7d83a2b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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