Entries Missing in Sony Playstation 1 rdb.

[kikmon]

Hi
I'm opening another issue because this one is different from the internal Serial Discussions.

I'm investigating a few games that are still not scanned properly, and it looks like they don't have a proper entry in the rdb.
Specifically,the game 'A Ressha de Ikou 4 - Evolution (Japan)' (the rdb contains the Rev1, the Gentei Set, but not the original one.)

The Dat looks fine (https://raw.githubusercontent.com/libretro/libretro-database/6c99b9b0fa442d4b4ecd776ae151758db247d697/metadat/redump/Sony%20-%20PlayStation.dat_, but the rdb does not contain the entry at all.
If I regenerate the rdb myself, the entry is added properly.
I'm not sure how this could happen, and I cannot find a trace of an automated process for the rdb update.
Is the whole process manual ?

In my case, I recompiled the c_converter tool to create the rdb and ran it on the dat, and the entry was present in the generated rdb.
Is the actual process more complicated that that ?