Failure to write a beneficiary does not mean that there is no designated beneficiary. Now many insurance policies are legal heirs by default.

The legal heirs are the parents, spouse and children of the insured.

Unless there is no beneficiary in this policy, it will be handled according to the insured's estate.

Did you write a form when you applied for insurance? Please check whether there is a legal heir in the beneficiary column of the policy first.