Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 12325804e3fa378dc700be5fa5f17e13c21d596e5af90e051ffa8c6a76a37af5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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