Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 9e47640058144479cf3bb0f349e8c1d90cfbef74985637f50ac74380a0a07bb9:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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