Can we have separate initial numbers for workers and separate ones for Personal Contacts?

Summary:

We need to have separate sequence numbers for workers (For ex: workers start from #50 and go on #51, #52, #53… etc.) and at the same time different sequence with a different initial numbers for the personal contacts (For ex: contacts start from #1000 and go on #1001, #1002, #1003… etc.)

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