We are in the process of deploying some multi-instance FPR3130 pairs. The FPR3130's were supplied with 7.2.8-25 so we manually upgraded them to 7.4.2-172 and then onboarded them into the FMCv where we then converted them to multi-instance. We then upgraded the FMCv to 7.4.2.2-28 and proceeded to upgrade the FPR3130 chassis to 7.4.2.2-28 and then the instances to the same version.
7.4.2.3-4 recently popped up on CCO for the FMC and the FPR3100 series, so I'm looking to upgrade before any of this goes live. I upgraded the FMCv easily and I'm now looking at upgrading the 4 x chassis. The software is downloaded to the FMC. If I go to Devices, Upgrade, Chassis Upgrade, it shows '4 devices and 8 clusters/HA pairs are not candidates to add to your upgrade list' in the Device Selection panel, and in the right panel showing the chassis and instances, it shows each chassis with version 7.4.2.2-28 and the Details saying 'Already running target version or later'
If I go to Devices, Upgrade, Threat Defence Upgrade, it shows '8 clusters/HA pairs are candidates to add to your upgrade list' and '4 devices are not candidates to add to your upgrade list'. So it looks like I can upgrade the instances, but not the chassis. Is this a bug or by design? I can't see anything in the release notes relating to this.
