While uploading a 2-year-old OBC certificate might seem problematic, since RRBs often require a more recent certificate (ideally within a year), you should present your new, valid OBC certificate during document verification.

RRB Requirement:

RRBs typically require candidates claiming OBC reservation to produce original caste certificates (in the prescribed format) that are valid as of the closing date of the online application.

New Certificate:

Since you have a new OBC certificate, it's the document you should present during document verification to substantiate your claim.

No Rejection (Likely):

If you present a valid, current OBC certificate, there's a high chance of your candidature being accepted.

What to do if you don't have a new certificate:

If you don't have a new certificate, you may be considered as a general category candidate.

Non-Creamy Layer Clause:

Ensure your OBC certificate includes the "non-creamy layer" clause, as this is a requirement for OBC reservation in central government jobs.

Check Notification:

Always refer to the specific notification of the RRB exam for the most accurate and up-to-date information on document verification requirements.