Help on how to get another dog/puppy to stop “clinging” off my other dog?

Hi! Need help on an issue I’ve been having with our dogs, we have 3 dogs and they all technically get along very well other than the fact that two of them “cling” to our one dog. The dog that they cling to is the oldest (almost 5) she is super submissive towards them and tolerated anything that they do. The other ones are 2 and almost 1 year. We repeatedly recorrect the two younger ones and redirect them away from her, but they won’t take their eyes off of her and always grab onto her neck, ears, and sometimes even legs. Because of this we don’t even let them out together at the same time normally as it is resulting in her getting hurt. I haven’t ever really heard of this being a thing before and never experienced it in all my years. Not even really sure how to describe it haha! Does anyone have any solutions on how to fix this problem?