Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2edec08e6d935e67332802041ff669057859359c2a6254a8b45d914ce0c20a50:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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