Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0fd5ddc0b830aad2936cf5985418d718ed71b02d583f0dad85b7e24e0a4b2c53:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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