you cannot reconcile a/p invoice transaction with A/P Down Payment request manually

Dear Experts,

One of my client has facing this problem while doing Reconciliation then he is getting the following error.

"you cannot reconcile a/p invoice transaction with A/P Down Payment request manually"

then we found a solution in SAP Forums and applied the same in Test Company Environment, then its working good and also attaching the scenario with screen shot.

Please have a look into the attachment then tell us. Is it a good practice to proceed or is there any solution as simple as this.

One more thing is my client has having more 20000 records to do reconciliation and he is looking for any alternative solution.

So please tell us a Better solution.

We are awaiting for your prompt response.....