Asmodean 99+ day(s) ago | It does that when you capture a planet that had pop at a higher housing infra level than yours. Once you add infra to it, the surplus pop reduces to what your housing level is, so the extra labor you had available suddenly never existed. The game accounts for this by displaying a negative labor.
To correct this, you must demolish non-housing buildings until you see a positive available labor. Then you can build housing as necessary to fluff out your colony the way you want.
I hope this helps
~Asmonewb |