Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0043075b19acc08b0f194c8653b07b00da55a40b8680a977821860d2761d28b7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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