Citing my own undergrad thesis in PhD proposal?

I'm a first-gen student finishing my PhD proposal and the writing center tutor flagged that I repeated three paragraphs from my old undergraduate honors thesis without a proper citation. My advisor mentioned that doctoral schools are seeing more pushback on recycled content lately, so I'm terrified of getting rejected for academic integrity violations. I only have four days left to submit, and I'm confused whether I should paraphrase, quote with a self-citation, or delete those sections entirely.