I am getting this error when I install knowledge management . How can I solve it
ParseError: "External ID not found in the system: base.module_category_knowledge_management" while parsing file:///C:/Program Files (x86)/Odoo 9.0-20160803/server/openerp/addons/knowledge/security/knowledge_security.xml:5, near <record id="base.group_document_user" model="res.groups"> <field name="name">User</field> <field name="category_id" ref="base.module_category_knowledge_management"/> <field name="users" eval="[(4, ref('base.user_root'))]"/> </record>