Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f126456af250a57663bba189a28c1395d61ff69e8e8a7bfc01a023bb01e2e07f:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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