KöMaL 2025 B5454

Positive integers $a_1$, $a_2$, $a_3$, $\ldots$, $a_{2024}$, $a_{2025}$ are chosen such that fractions $\frac{a_1}{a_2}$, $\frac{a_2}{a_3}$, $\frac{a_3}{a_4}$, $\ldots$, $\frac{a_{2024}}{a_{2025}}$ have pairwise different values. At least how many of the numbers must be different?