Hololive English: The undead timeline

Amelia Watson is Hololive's number one detective, but she's not just a detective, she's a time traveller. She has what looks to be a regular pocket watch, but it's much more then that. She can use it to time travel and go to different timelines, but what happens when she's sent to another timeline and her pocket watch breaks? Surely it's not a dangerous timeline. Right?

(Lore might not be entirely accurate)