After installing odoo on my ubuntu 12.04 LTS desktop, I was able to access it (odoo) from my web client. However, after some days, I try to access the application from the web client again but I get an internal server error. Below is the information displayed in the log file:

res = self._obj.execute(query, params)

ParseError: "value too long for type character varying(4)

" while parsing /usr/lib/python2.7/dist-packages/openerp/addons/base/res/res_currency_data.xml:349, near

<record id="RUB" model="res.currency">           

    <field name="name">RUB</field>           

    <field name="symbol">&#1088;&#1091;&#1073;</field>           

    <field name="rounding">0.01</field>           

    <field name="accuracy">4</field>           

</record>

What does this mean and how do I fix it?