Ask Social Security Questions and Get Answers ASAP
There are certain times that having 2 SSNs assigned is allowed. Your post did not say why you applied for a different number except for the credit card situation which by itself is not an acceptable reason.
When SSA assigns a different Social Security number, they do not destroy the original number.
They cross-refer the new number with the original number to make sure the person receives credit for all earnings under both numbers.
If you applied for a SSN instead of a replacement then you need to make an in person visit to the local SSA office.
You are going to need to include all your SSNs on the bankruptcy statement anyway. SSA can correct the active nature of one of those cards but the proceedings for bankruptcy will require you disclose all you have used and been assigned.
Please advise if you need more information