This is not something support can assist with and is generally highly discouraged. There are TONS of interdependencies that link topics with posts, that are associated with other actions, etc. Those interdependencies can cause unintended consequences if you are manually adjusting the database.
In addition, your site has new posts that are happening since the restore was complete. Let's say back in January, the last topic ID was 1000. The next topic in Feb would have been 1001, 1002, etc. Well... since that restore, the activity after that restore is now getting those IDs. Meaning IDs would be mixed up, and lots of things would not match up the way they should.
With that said, you can try working with a 3rd party resource author to help with this, but just realize it's not a simple operation. It also means you may have things not working exactly as they should and that IPS itself would generally be unable to assist should something go wrong. Basically you would be in a situation where you have to restore that database again from the last good backup and lose even more content should the worst case happen.