What about Burke's Social Contract For The Ages? As much as society is the balance of our momentary self-concerned needs with those of others, there is an extent to which we must balance our eras momentary or short-term needs with long-term concerns that reach beyond the lives of individuals and even nations - likely say climate change, or nuclear waste.
It is easy for us to dismiss our formative stages, our past idealism or whatever, naivety, immaturity etc. If we fail to integrate and accept them, we risk failing to understand and accept others, going through formative stages. This is brought in to sharper focus, when we think that our future self may look back on right now, and dismiss your current concerns as baseless, meaningless, trivial. I would say your future self has a duty to maintain continuity, connection, with your current mindset, to at least honor it as part of your path, and not to wipe out the memory or remains of it in a way the prevents any possible reconciliation, integration, or reinterpretation. If we don't understand history, we repeat it, or someone else does.