Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 022f39d9baeb41bcf2835d3db2b3396b705817113dc7aaf36e4bc1b5107e404b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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