Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b61d39324db9953074c2d24fde0b77e73a04f5f50bb6d119ff574f76bed80e14:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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