Period Split in Table S066 - moving SPMON to SPTAG for open orders

Hi guys. We need a light to my cutover...

We need to change in OMO1 (period split) the credit horizon (period) to analyze by currente date (SPTAG). Before this, we worked with period split by month (SPMON).

To new orders, we see in S066 table SPTAG is filed correctly.

But we have many others open orders with the SPMON filled (month).

Is there any program/report to update the table S066, moving the info from SPMON to SPTAG for open orders?

Thanks in advanced and best regards...

GLippmann