While version 2.11.431 is now obsolete for daily messaging (it will usually prompt you to update immediately), it existed during a major turning point for the app:

Using 2.11.431 today means missing out on over a decade of features:

: Attempting to install this version today usually results in an "expired version" error or an [INSTALL_FAILED_VERSION_DOWNGRADE] message unless you use specific developer tools like adb . Issue #10 · EliteAndroidApps/WhatsApp-Key-DB-Extractor