Subform Element : not working properly

Hello All,

I have created two subform elements where #id is 'article_node_form' in both.
because #id is same it overwrites the values of node so both node has same values.

if i create two subform elements with diff #id then it works fine. then what the solution if there are more than one same form id of subform element , i want to preserve all node values as it is.

if anybody know then plz reply me.

Thank you