Wrong date of birth on pr application

[Kiranjotgill]

My brother's date of birth is July 1980 and mine is Feb 1982.but his date of birth was mistaken by school to 1981 (just 7 months )No one noticed till my brother first came to Canada in 2007.when he filled his documents the agent noticed it and just put the wrong one for mine (not sure which year ) .then I came as a PR in 2012. Now my brother want to apply for my parents as a visitor. My parents have to fill their kids information does it effect on my brothers PR.