Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2d08ef5565a3d48245ad101b99c73ac5a31aff495a14ce8bd731c79ca3b5c10a:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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