Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a2207c0b3fd2ffd7acf0f467dc1c3fefb8b01ba5729c7b968339055838c4211a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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