Problem with empty Vacationlist in Config XML

[schaffel]

I try to configure the different Calendars we use for our SLAs in a xml config file.
We have a 24x7 SLA where I have to define the TimeVacationDaysOneTime and TimeVacationDays List as empty.

I tried to configure it like this:

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    <ConfigItem Name="TimeVacationDays::Calendar1" Required="1" Valid="1">
        <Description Translatable="1">Adds the permanent vacation days for the indicated calendar. Please use single
digit pattern for numbers from 1 to 9 (instead of 01 - 09).</Description>
        <Group>Framework</Group>
        <SubGroup>Core::Time::Calendar1</SubGroup>
        <Setting>
            <TimeVacationDays>
            </TimeVacationDays>
        </Setting>
    </ConfigItem>

When I run the RebuildConfig-Script I get an Error:

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]# bin/otrs.RebuildConfig.pl -?
otrs.RebuildConfig.pl - OTRS rebuild default config
Copyright (C) 2001-2015 xxx, http://otrs.com/
Can't use an undefined value as an ARRAY reference at /opt/otrs/Kernel/System/SysConfig.pm line 2271.

Is there any way to configure empty Vacation lists in xml?
I didn't find anything on that in the Documentation and all the default-calendars have at least one item defined. ;(

I think I could have done it as a perl (.pm) config file, but I tried to keep the base configuration in xml.

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$Self->{'TimeVacationDays::Calendar1'} =  {};

Thanky in advance.

[reneeb]

Untested:

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        <Setting>
            <TimeVacationDays>
                <Item></Item>
            </TimeVacationDays>
        </Setting>