Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 010b564960dc2e7d3ee2862bcb62d4127d332b71c1478b9632e35c05685d01f7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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