to link the previous PF account, you have to apply online on the EPFO website after logging in to UAN. Then you can merge both accounts. Process of merging two EPFs with UAN? To merge UAN ...
In this case, as you have been assigned two different UANs, you would need to merge the UANs and the PF accounts. This process can be undertaken online on the EPFO website after logging into your UAN.
The Employees' Provident Fund Organisation (EPFO) has announced major changes to facilitate online transfers ... and allows members to transfer their PF accounts free of charge.