Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> d48228d26ba8d168b2fa32d06621c8b590d9d8b560afdc0e044db738ac405676:80:20
   |
80 |         let item <- self.listing.purchase(
81 |             payment: <-self.paymentVault
82 |         )
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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