Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 02aad0537a76cacac5ec83556eb9f65bc62dbf38c3627ca161203a1289b752ea:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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