Starting Over Questions

[gloranphile]

So I've had the same realm for several years along with various bugs and issues.

I'm starting over with a new blank realm, mainly for Mechanics at this time, but I want to make sure I avoid issues when exporting/importing via RW.

My main question is this: Should I create all new categories from scratch (called for example Character Creation, Skills, etc.)? Or, should I duplicate existing Categories and Remove Protection on the custom one?

Again, this is mainly to avoid any issues when exporting/importing, since I'd like these rules to be the default for future games.

Clarification: In the above question, I would NOT delete or otherwise change the default Categories, only Remove Protection from the duplicate (which is also renamed and given different tags).