Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4a5e509ad505d1a762925bbddce3e784bd4218287a7d337cd26e48ae637c1fbe:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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