I'm more used to US/EU type JCV files which are usually named in this style: DxxxxxxxA (x=figure) and they are specific to a particular map release. The file names follow a sequence in a map series, eg, for CNNT NA Version 2013.20 it's D3060070A.JCV, 2013.20 was D3060060A, 2013.10 was D3060050A, etc. Those files are not normally inter-changeable between versions.
Asian files are different, not only to US/EU type, but also differently encrypted to each other so only TH fw sees TH jcv but cannot see SG/MY or any other Asian jcv files and vice versa. The Asian files also are named differently to US/EU.
However, as i said earlier and as far as i know, the same goes for Asian JCV files in that they are specific to a map release, but why not try an earlier one with a current map if you want, and report back as to if it works or not.
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