Per the description of the spell, you need to make your own table, and you will also need one for Dragonkin and Urogs and more - more broadly, all Aberrations, Animals, Constructs, Dragons, Fey, Magical Beasts, Monstrous Humanoids, Oozes, Plants, and Vermin will need their own tables. Past that, you're asking for Advice, not Rules.
In terms of advice, Reincarnation is a very poorly designed spell, because it includes an explicit list of humanoids to reincarnate into, which is fundamentally incompatible with the fact that Starfinder has released humanoid races post-CRB and will continue to do so (for example, it is patently ridiculous that you need the 100 roll to have any chance of being reincarnated as an Alien Archive humanoid, e.g. a Reptoid). There is also no guidance offered for constructing alternative tables, and the table itself offers, with no explanation, biased results, with races varying between 4% and 9% (not including the 1% chance for all non-table options). You don't have much to work with when it comes to designing your own tables.
Instead, and to prevent exotic problems introduced by a "proper" reincarnation spell (which ought to be able to reincarnate a target into a species that has not even been contacted yet, which is potentially funny, but rife with problems if accidentally rolled), I'd recommend fundamentally restructuring the spell to have a table shaped like this:
D%
1-16 Original species.
17-48 Target creature may choose any species not including their original one, of the same type, known of by the creature.
49-96 Caster may choose any species not including the target's original one, of the same type, known of by the caster.
97-00 GM may choose any species.