I did some code to update the child partner records automatically upon modification of a field, stock_owner_id. I overwrote the "write" function to achieve that.

 @api.multi
    def write(self, vals):
        """ This will overwrite children stock owner to the same as the current one.
        """
        soid = vals.get('stock_owner_id')
        
        if soid is not None:
            children = self.search([('parent_id', 'child_of', self.ids)])
            
            if children:
                children.write({'stock_owner_id': soid})
                
        result = super(Partner, self).write(vals)
        
        return result

Any suggestion to prevent that behaviour and still update all my children in bulk?