Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 098c1b2ed4e549081f35b4cd3dba8c26d3d58952b3f340aca9efa15c4da8c071:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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