currency not applied after the server restarts

[llronaldoll]

create a new currency but the plugin does not let me use it, it always puts the default currency coin as the current currency after restart

coin {
plural
singular = Coin
symbol = C
}
current = coin
real {
".plural" = Real
".singular" = Real
".symbol" = "R $"
}
zeny {
".plural" = Zeny
".singular" = Zeny
".symbol" = Z
}