DUAL UAN - Which Number I Have Used To Pay The ECR?

An employee having UAN. In epf version 2.0 defaultly generated the new UAN for the same employee. Now, in which no i have used to pay the ECR for the month of dec 2016. Need your help

if the employee has active UAN from past, then the old one should be continued

Please keep continue Old UAN No.
Regards,
Ajay Jha
Globalflick Innovations Pvt Ltd

Dear Learned Members,
Greatings,
We also were facing the same problum of the double UAN, and while uploading the Chalan, the PF site show mismatch in Members details and wrong UAN and the chalan was accepted when the new System Generated UAN was considered.
Kindly advise how to deactivate the new UAN and all the employees wish to continue with the old one.

@brijesh
end of this month ask all such employees to file their amounts paid under new uan to old uan via this portal One Employee One PF
and from next month continue to pay with old UAN,
as soon as the transfer will take place, the new generated UAN will get abolilshed auto