remove more unwrap

src/data.rs

@@ -6,7 +6,7 @@ use std::str::FromStr;
 use rusqlite::ToSql;
 use rusqlite::types::{FromSql, FromSqlError, FromSqlResult, ToSqlOutput, ValueRef};
 
-#[derive(Clone, PartialEq, Eq, Debug, Hash, Copy, Ord, PartialOrd)]
+#[derive(Clone, PartialEq, Eq, Debug, Hash, Copy, Ord, PartialOrd, Default)]
 pub struct Id(pub(crate) u32);
 pub const INVALID_ID: Id = Id(0);
 impl FromStr for Id {