The new wiki at
http://eqemu.gitbook.io has all the database documentation.
As far as the allocations, if you look in the char_create_combinations table you'll notice that it uses the allocation identifier from char_create_point_allocations. So if you already deleted those rows, you'll have a hard time mapping them manually.
This query should pull all the ones you don't need anymore.
Code:
SELECT * FROM `char_create_point_allocations` WHERE `id` NOT IN
(SELECT `allocation_id` FROM `char_create_combinations`);
https://eqemu.gitbook.io/database-sc...nt_allocations
https://eqemu.gitbook.io/database-sc...e_combinations