Can a PrestaShop 1.6 store move directly to 9?

Technically the goal is possible, but the safer productized path is usually migration into a clean target instead of carrying old runtime and module debt forward.

What happens to old modules?

They should be classified as replace, rebuild, migrate data only or remove. Unsupported module data should not be imported blindly.

Is SEO preservation automatic?

No. SEO preservation needs exported legacy URLs, redirect mapping, canonical checks and post-launch 404 monitoring.

PS Trust Suite

PrestaShop 1.6 to 9 migration plan | PS Trust Suite

A PrestaShop 1.6 to 9 migration plan for catalog integrity, preserve IDs, module replacement, theme rebuilds, SEO continuity and launch validation.

Guide: Upgrade guide. Intent: Legacy PrestaShop 1.6 stores moving to PrestaShop 9.

Why migration beats a fragile direct upgrade
Build the target store before final data transfer
Preserve historical data without importing legacy technical debt
Launch only after parity and SEO checks pass

Key topics: PrestaShop plugins, PrestaShop migration, PrestaShop security module, PrestaShop captcha, PrestaShop social login, WooCommerce to PrestaShop, Migration Cockpit, preserve IDs migration