Hello - I have unreconciled entries going back several years which I think affect my register balance. Is that correct?

In some cases there was a duplicate entry which did get reconciled; in other cases I assume I did a balance adjustment.

My question is "can I delete all UNCRECONCILED ENTRIES from 1st quarter of 2021 and 2020 - 2019?

Thank you so much for your helpful advice. Won't let me attach a sample of my QB register.