If this program is compiled:

class Super {
    static void m() {}
}

class Sub extends Super {
    private static void m() {}
}

you obtain this error message:

Test2.java:6: error: m() in Sub cannot override m() in Super
    private static void m() {}
                        ^
  attempting to assign weaker access privileges; was <----- was what?
1 error

if the static modifier is removed in both methods then the error message specify that the access was "package"