Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 38a17598946f81c80b28f9756ed1b2d84b08f832f8580887bfa458a367699448:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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