Party member 1994 was sentenced to probation for bigamy. How to deal with it?

Party member 1994 was sentenced to two years' imprisonment and suspended for two years for bigamy.

According to the regulations of party constitution, the following punishment should be given to expel from the Party.

1994 was sentenced to two years' imprisonment and suspended for two years. Should the party discipline be punished now?

If it was discovered at that time, there was no punishment; There should be no more punishment now. Because: it is better to pass.

If it was not found at that time, and now it is found, it should be given the punishment of expelling from the party.