Hi Naveen,
What is the reason for mking this kind of upgrade?
Have all of the legal entities been merged and do they form one single legal entity?
If this is not the case then you are probably better off using the 4 legal entities you used in the past.
Otherwise, you run into a lot of issues where you might need modifications.
Ex: Legal reporting for taxes and other statutory reports, auditing for each of the legal entities, etc.
You can find a couple of related posts in this forum where people came up with similar questions.
I would recommend that you also search for and check those earlier posts.
Best regards,
Ludwig