Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 6a0ab503944a1e5c7b9aea4aad106e708e083d61205efe6a1d066f7550d7d60e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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