Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 48098d5f7c5a0534842ea622c2bea50062a8326a1eda664a732799c41952c572:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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