Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e13fb0a107b2d9de63b11c306d0fdd6174ae5df9f82f07103152d38b3632197f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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