Beneficiary updating

[Skramy]

One of my 3 beneficiaries has incorrect SS number. Last digit is incorrect. Can't correct it online. Called TSP - gal said she can't access SS numbers either.
Is it possible to delete ​one beneficiary online, and then 'add' the same person with the correct info?

Note: Last time I updated bene's was 2019. I mailed in a TSP-3 form. My photo copy of that form has correct info.

 

[tsptalk]

So the TSP screwed up the SSN? Wow.

I would only be speculating when saying it should be possible to delete / add bene's as needed online, but I haven't tried that so not much help.