Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a13391734212e134355a661f787667c9c06c3ab95efdbf25606fc97f7f60acd1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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