I have 21k in the Lifecycle fund (2050) w/ TSP. Is it safe there? Should I leave it or move it?

I've heard that there are safer and riskier funds, I don't know anything about investments, this is just where it was put by the DoD while I worked there. I want to be sure my savings are in the safest possible fund they can be in right now, I want to err on the side of caution. Does anyone have advice? Thank you.