insert Script into Ledgerjournaltrans

Hello my dears,

can anybody tell me from where should i got the next RECID id number in case i need to insert data into Ledgerjournaltrans by a SQL script?

As Durring my searching over the internet, i found that many posts speaks about (SystemSequences) but actually the values on column NEXTVAL in that table is not matching with RECID generated on the (Ledgerjournaltrans )

can some one help me?