Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3f3792aac02f3ba24389495c5c30b801ccc79d0597913310e69657c257088f2c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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