Help urgent, appreicate any advice! Parent personal history different than previously visa application

[bingliusmart]

Hi Deal Members,
Appreciate any help or advice!

I'm sponsoring my parents and for the personal history, I found that my previous mistake when applying Visa for my parents will result in discrepancies in my parents personal history:

• My parent served in the army 30 years ago, but in my previous Visa application, I remember I checked "No" for military experiences
• My parent's retirement date, now looking closely the date is half a year off than the date I put on the previous Visa application

I'm not intend to hide his experience for immigration application, however this will result in the personal record not matching the previous Visa applications.

Need advice on if anyone had similar not matching profile experiences and is there a chance for explanation if CIC enquirers about the mis-match?

Thanks in advance for any advice.