Invalid time format for an hourly job (valid format is (MM)?:SS)

Raise code

unit == "days" or self.start_day:
            if not re.match(r"^([0-2]\d:)?[0-5]\d:[0-5]\d$", time_str):
                raise ScheduleValueError(
                    "Invalid time format for a daily job (valid format is HH:MM(:SS)?)"
                )
        if self.unit == "hours":
            if not re.match(r"^([0-5]\d)?:[0-5]\d$", time_str):
                raise ScheduleValueError(
                    "Invalid time format for an hourly job (valid format is (MM)?:SS)"
                )

        if self.unit == "minutes":
            if not re.match(r"^:[0-5]\d$", time_str):
                raise ScheduleValueError(
                    "Invalid time format for a minutely job (valid format is :SS)"