Child table primary key duplicate issue

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frappe.exceptions.DuplicateEntryError: ('Employee Education', 'row 1', IntegrityError(1062, "Duplicate entry 'row 1' for key 'PRIMARY'"))

I am using Employee’s Child Doctype (Employee Education) in one of my custom doctype and with same configuration as Employee Education Field

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But the problem is it is not generating random name when I create record from My custom Doctype, so it is giving me Duplicate primary key error
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As you can see in above screenshot the row 1 and row 2 records are generated from my custom doctype.

Is there anything I am missing?

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Anyone??

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For now, I have set the naming rule to “Random Hash” in the Employee Education doctype via the Customize Form and exported it to my custom app.