-100% production for jubilant pop.?

[jc173]

Recently I've started tinkering with the data files for SE4, mostly faclilites and components. But in my Last game I noticed that a large portion of my planets couldn't manufacture anything so I took a closer look. Checked the abilities and it said -100% production due to happiness. Went back to the main info on the planet and it had a jubilant population. I don't think I've messed around to much with happiness in the settings or happiness.txt files, but I may have inadvertently saved a junk value in one of them. Anyone know what lines in particular might affect production and happiness?