Changing plans midstream s a good way to burn yourself. If you had a reason for the 60/40 split, and that reason hasn't changed, your last sentence is nonsense.
That reason probably came from the fact that bonds tend to move in the opposite direction from stocks in the short term, and a balanced mix of these damps out those swings. For that to work, you need to be willing to recognize that when stocks are high and bonds low you want to move money from the former to the latter, selling high/buying low in preparation for the next shortterm swing of the pendulum
It's always tempting to hold onto the investment that's doing well. But remember past results are no indication of future performance, and the market may start moving in the opposite direction. If you left the money in the stocks that could wipe out your gains. Trying to guess the ideal point is somewhere between difficult and impossible; it's a lot easier and more reliable to make a plan and follow it..