How can I reset password for admin user on Brocade switch?

Dear All,

How can I reset password for admin user on Brocade switch?

I am getting this warning:

Changing password for admin
Enter old password:
Password should not be same as any of the last 5 old passwords.
passwd: Password matches one of the previous passwords

as there are 10 switches, I need to keep same password for all, so that it can be easy to remember,

Kindly guide.

Thanks