Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4bce267248cf79e2c2667dc0d5002788e62fb0bf09f6b89b1fe80a1784866aef:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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