Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 59d0b8c8036338599d921cd3950f7714e0b7902e6fd19a55b0287ae5522906e3:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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