TDS Events

Hi,     Can anybody tell me about the below TDS Events

1)      OLD TDS PREPAY UNAPPLY

2)      OLD TDS INVOICE PREPAY

Whenever we perform any action on a standard invoice with TDS Taxes will populate the table JAI_AP_TDS_THHOLD_TRXS with details. For Ex: When we validate the invoice with it populate the table with details TDS_EVENT “Invoice Validate” likewise we are having Invoice Cancel, Prepayment Application, and Prepayment Unapplication.

But I am not clear with TDS Events OLD TDS PREPAY UNAPPLY, OLD TDS INVOICE PREPAY. I would like to know when this type of TDS events generate.

Thanks,

Srivardhan