Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1a58fb995d953ed9e848967e74995435a0a1bbf21cec41ca798c181beb527301:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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