Making a change now will just realize what up until now are virtual losses.
You are young enough that I’d ride out your current positions but you may want to call your 401k administrator and ask that all FUTURE contributions be steered into different allocations (e.g. cash or bonds).
OTOH, now is also a GREAT time to buy as others flee the market. Everything is discounted; when the market turns around, which it eventually will, you’ll realized some nice returns.
OTOH, this crash could end up with us all living in cardboard boxes and money will have no value…..