I don't really know to be honest, that's just what happened to me.
Easy solution is, sell all your stuff and give the money to someone, then get it back when you restart. Given your experience you can reach the same level in 1/2 the time easily and people won't treat you like a n00b since you'll actually know what you're doing. :)
I got to level 40, then had to start again *shrugs*.
I heard that American Beta Testers got to migrate or something though, so like I said. I'm not really sure. :s
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Squaresound ~ A very useful site for people who wish to learn about Final Fantasy Music