I am trying to upgrade from Odoo11 to Odoo12 using Openupgrade. But i am getting the below error.

  
odoo.tools.convert.ParseError: "UoM category Weight should only have one reference unit of measure.
None" while parsing /home/kabeerkb/openupgrade/OpenUpgrade-12.0/addons/uom/data/uom_data.xml:42, near
record id="product_uom_kgm" model="uom.uom"
            field name="category_id" ref="product_uom_categ_kgm"/
            field name="name">kg            field name="factor" eval="1"/
            field name="rounding" eval="0.001"/
        
        

I think Openupgrade again trying to create the UoM master data How can i disable this while i running the odoo in the terminal?