The article says he (Johann Leopold) was convicted (verurteilt) but doesn't specify the sentence..
In the case against Carl Eduard it says that his daughter Calma had accused and blackmailed her father and threatened to go public with his allegedly abusing her as a child (in german: Sie verklagt und erpresst ihren Vater Carl Eduard und droht damit öffentlich auszupacken, weil der sie angeblich als Kind missbraucht hat.)
The article does not state dat CE was convicted, and since it does mention JL's conviction i assume that had there been a conviction of CE it would have been mentioned...
by the way: Calma herself was accused, convicted and sentenced to 6 months in jail in 1956 on a different matter
My opinion is still as it was on the previous page, that because JL was convicted doesn't prove his father CE was also guilty of incest, and i hope we still go by the statement "innocent until proven guilty"
Edited: on german wiki it says that JL was convicted to two years jail or workhouse (Zuchthaus) and his connections with his siblings were ended after the conviction, he didn't attend his father CE's funeral