Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d6a61b5bcf10f8f2ab1b5969545e1fdfe8c379b2427990914f135aad32e8e256:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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