Solution:
remove "--chuid man" from file


example:
before:
start-stop-daemon --start --pidfile /dev/null --startas /usr/bin/mandb --oknodo --chuid man --iosched idle -- --no-purge --quiet

after:
start-stop-daemon --start --pidfile /dev/null --startas /usr/bin/mandb --oknodo --iosched idle -- --no-purge --quiet

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