Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2bfd821e552f17a0c8eb6485e49a7a760af0c328526651cd3a26b012260a43c1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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