I am planning this upgrade. Anything specific to plan ?
Please think twice since last time (from 22.214.171.124 to 126.96.36.199), there was big bug with no import of the BigIP config since the cipher was not approved by 188.8.131.52)
thank you for your help
Sounds like a good plan. This is a supported upgrade path: https://support.f5.com/csp/article/K13845
...and, if you need guidance with the upgrade/update, you can also look at the (relatively) new BIG-IP Update and Upgrade Guide on AskF5.