Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 361cb82c246f3ce6111a00308605d704c550420ec2a4596fd8c93d0608ec752b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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