The soldiers will each now serve 10 years in prison and the sentence is to run concurrently.
According to the Director Army Public Relations, Colonel Sani Usman this decision followed an order by the Chief of Army Staff, Lieutenant General Tukur Buratai, to examine the merit of each case.
The soldiers were part of seventy-one soldiers arraigned on several count charges including criminal conspiracy, conspiracy to commit mutiny, insubordinate behaviour and false accusation.
They were tried and discharged on some charges but found guilty and convicted on other charges including mutiny.
Five others were discharged and acquitted while one was sentenced to 28 days in prison with hard labour.
The case of the other soldiers are still being reviewed and the Army says it will be made public once the appropriate reviews are completed.