If you used features specific to the newest version (e.g., a specific new type of gradient, a new text-wrap feature, or updated footnote options), the older version will try to interpret them, often resulting in:
: Respect for elders is a universal value. Society is often structured hierarchically, visible in family seniority, caste rankings, and the formal deference shown to superiors. how to convert indesign file to older version link
For extremely old InDesign (CS2–CS3):