Where do you see that they were told to "replenish"?
My ESV says "be fruitful and multiply and fill the earth"
Wow really?? The KJV is all I study. It was taken from the Septuagint and from the Hebrew texts. Don't misunderstand that with any language translation there will be transliteration and the further you get from the original the worse that gets
KJV and ESV are both word-for-word translations from the original texts, neither of which even remotely kinda sorta hint at any existence whatsoever prior to Adam. Any notion of that is fully extra-biblical.
I suspect we may be confusing the similar commands from the Lord in Genesis 1 (to Adam)and then again in Genesis 9 (to Noah and his family after the flood). Without writing a book, the whole "first Adam and last Adam" terminology also refutes it.