Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 45d14baa3f7ecd6a4161f8b6efc1b036694898218279d658cd3d1c5379f7b8d8:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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