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Those that seek me early shall find me. - Proverbs 8:17
Then shall they call upon me but I will not answer; they shall seek me early, but shall not find me. - Proverbs 1:28
We are told that these contradict one another, but these verses are talking about two entirely different groups of people: Those who want wisdom, and those who don't (note the conditional word "then" that appears in verse 1:28). The arguments involved are a progressive proof that leads to a conclusion; rather like Paul's statements in Romans, first that the righteous shall be justified by deeds of the law, followed by his proof that no one is righteous.
The chapter 8 verse is indeed a counter-point to the chapter 1 verse, but in the sense of comparison, not in the sense of correction. This is a form of progressive dialogue argument typical of ANE literature -- for more on this genre, see here.