Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1f2e26c9a4dd3e6207cc490f52360356763186ec37d1200abcc082fd58e3ec7d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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