im not so aware with fortigate upgrade/downgrade process.
The second part of my cluster got down because the image got crashed and i proceed with installation of another image.The previous version was 5.2.4 buld0688 - now is 5.4.2 build 1100 and my environment now use the Active node from the cluster
which is 5.2.4 build068.
The only thing that i want to do is to downgrade the crashed fortigate to 5.2.4 build0688 version but my roaming over internet doesnt take effect because cant find this version and build.
Does somebody can navigate me how i can take one of this images.
The upgrade path is designed to have a valid config so that the device will work.
On every update the config will be modified if necessary.
In your case the only way is to reset the device to the factory settings
by formatting the device.
This can be done via console (TFTP) or the FortiExplorer if it is supported.
Then you have the corresponding config for this firmware release.
This should give you a working device and it's just like using the upgrade path.
The only difference is that you have to reconfigure it.
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