<record id="product_reduce_member" model="product.product">
<field name="pos_categ_id" ref="point_of_sale.categ_others"/>
</record>
+ <record id="product_group_membership" model="product.product">
+ <field name="pos_categ_id" ref="point_of_sale.categ_others"/>
+ </record>
</data>
</openerp>