Hello Archana,
1. "is it necessary to always check status ?"
not necessary but whenever new creation/changes of master data,it must be done.
2. "MKAL status is blank" and "because in C223 it is indicating GREEN button in those production version records."
Both not possible together.If its showing green than MKAL status can not be blank.
3. "We have uploaded PV records, but not doing CHECKING procedure. I think, that is why status in MKAL is blank."
yes
4. "Does it create any problem in a future."
no,but better you check all scenario(standard/custom) of your company.Without performing check either in c223 or in material master,green light wont flash.Hope its clear.
Note:Whats the big deal if you do the check now?
Regards,