FirePower Mismatch in ASA HA Pair Problem?

[Lifeisbeautiful]

I have noticed this on one of the ASA HA PAIR , FP mismatch.

Active 
ASA FirePOWER, 5.3.1-152, Up

Standby
ASA FirePOWER, 5.3.1-155, Up

[Marvin Rhoads · Accepted solution]

Minor version mismatch should not cause a reload. You can see the reload cause(s) with "show failover history" from the ASA cli.

Are you using the Firepower modules? If not, you can just uninstall them. If so, you should really upgrade them - your versions are literally from the initial release of Firepower on ASA time period and there are hundreds of new features and bug fixes since then.

[Lifeisbeautiful]

Thanks for your kind reply :)