Can't return row id 17 by getGeneratedKeys()

Question

I'm using sqlite JDBC 0.56 and the table is created using fts3

MY table is created by

stat.executeUpdate("CREATE virtual TABLE doc using fts3 (doc_name , doc_path);");

seems the problem is caused by this virtual table.

I tried to insert a set of record into a database and return the generated key.

But I find that when the key is becoming 17, it will be missing and return 18 to me.

After that, all result is increased 1 but when I open the database, all the records are correctly stored.

Actually, it will increase 1 when 16 records are added. That means 34, 51,.. will be missing

pstmt.executeUpdate();

rs = pstmt.getGeneratedKeys();

if (rs.next()) {

result = rs.getInt(1);

if (rs.getInt(1) == 16)

System.out.println("id " + rs.getInt(1));

if (rs.getInt(1) == 17)

System.out.println("id " + rs.getInt(1));

if (rs.getInt(1) == 18)

 System.out.println("id " + rs.getInt(1));

}

I had printed rs.getInt(1) to ensure that 17 is really missing. result: id 16 id 18

I want to know why rs.getInt(1) increased 1 in id 17 and how to solve this problem THX