Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
   --> 04627c79341e90468b92ed5682af94cd402f831d9bcdb2ca4e2852e335df1481:105:20
    |
105 |         let item <- self.listing.purchase(
    |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefrontV2:322:16