Divorce decree changes periodic payments

[M Norton]

45 year old male recently divorced, has IRA valued at $31,000, currently taking annual 72(t) distribution since 2005.

Divorce decree says they must split the IRA 50-50.

Continuing the same annual payments from 50% of IRA balance will deplete account prior to age 59 1/2.

Can payments be reduced for IRA owner due to divorce decree without tripping the tax liability for all prior payments?

Thanks!