Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2fdcc90411fc17f25c77e1db73465e6e0a7de2499fb0d144de1d8d0e2701ee62:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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