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[Jonathan5]

Does this help? Sub-sub-categories - #7 by Michael_Uray

@Michael_Uray

Quick guide to set it from 2 (default) to 3 via the console:

cd /var/discourse/
./launcher enter app
rails c

read current value:

[1] pry(main)> SiteSetting.max_category_nesting
=> 2

write new value:

[2] pry(main)> SiteSetting.max_category_nesting = 3
=> 3