[CentOS] Modifying username

I modified a users name on my system. From ABCLast, to ALast (used as an example).

I modified the username, then the group name of the user (to align with the new name), and then I moved the users home directory from /home/ABCLast, to /home/ALast. Then using vipw, edited the home directory to use /home/ALast.

When I got finished editing the passwd file, I got the following message: You have modified /etc/passwd. You may need to modify /etc/shadow for consistency.

I don't know what to do here. Need some guidance please.

lastly, did I miss anything here? Any other steps I need to do to get this user squared away due to the name change?

Thanks,

Jay