Use the Fortinet Firmware Upgrade Path Tool on the Support Portal. You enter your current version and your target version, and it provides the exact sequence of intermediate steps (e.g., 6.4.10 → 7.0.12 → 7.2.5). 3. Pre-Upgrade Checklist
You tried to skip a required version. Fix: Go back to the support site, map the exact path, and download the intermediate firmware.
classifies firmware into two primary maturity levels to help administrators choose the right version for their needs: Feature (F):
New device stuck after firmware upgrade to 7.6 - Fortinet Community