Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c042129f31cfcac7e68b2ed075f52a30c286f2c6b8cba1db750dc5e35828ab82:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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