Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> af3d2dc3ca10d02a1a439d4644122ecb90aabe84225128eb4e87bf76ddba3e32:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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