Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 33f5a93fb9c4b3934e5773c856557af06deecbe9bd62548b9c5f694c97e4990b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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