Not unless it becomes a bad habit
Rather than practice doubling up fingers - make sure your form is right first.
The most common error people make is thumb position - they align it with the index finger.
Maximum grip is attained aligning the thumb with the middle of your fingers.
Make a fist and slowly relax it, see where your thumb is pointing - grip a pole like your life depends on it, see where your thumb is pointing.
Also the thumb in this position facilitates maximum spread of your fingers.
Make an imaginary air grip of a guitar neck with your thumb & index finger aligned - now try to spread your fingers. If you are like most people only 3 fingers will move. Realign your thumb with the centre of your fingers and try again - all 4 fingers spread easily.
Having said that, occasionally when playing e shaped minor barres or a shaped 7th barres - I'll intuitively know I'm not going to make it and double up.
But first stop is get the form right.