It says on the official Xtale Account that the Overwrite Button has limitations here it is:
- It can’t overwrite an entire AU or the Multiverse itself by having just half of that ability. It only makes the user able to corrupt one timeline and the code from objects, humans and monsters that can be found there. The damage done can’t always be permanent or successful.
- It can’t be used over something or someone that is not usual in the Multiverse, like beings/objects without a specific code and original/unique characters that don’t exist in any other alternate universe.
- The true owner of each fragment must have at least 50% of their race’s HP to use this power. Determination allows each owner to exceed their limits during an Overwrite process, it also let them refuse to die in the case they’re out of HP, so they can get a new physical soul and keep using the full power of each fragment again.
- If the owner shares an equal amount soul/trait with an opposite race in the same body, it can limitate the Overwrite abilities.
The user can break those limits by becoming the “dominant soul” of that body
- The Overwrite button can only be destroyed by the current user and only when it’s complete.
