Approval Rule only when requisition is created using position

If i want approval only when job requisition is created using position, what condition i need to give?

The condition works fine when job requisitions are created from position.

Position Details.result.Position Code != Is null

I need to auto approve when not created from position(Job, Template, Blank), for this scenario i tried using the rule

Position Details.result.Position Code = Is null

And i am facing issue with this condition.

Issue Description	An attribute in the PositionStandard rule has a null value.

Resolution	Ensure that a value is entered for the mandatory attribute used in the rule configuration or add a not null condition for this attribute.