Unable to set default value for Seasonal Flag in Manage Positions Page

Summary:

Hi Team,

We are trying to set default value for "Seasonal Flag" field in Manage Positions Page. We are not getting Desired results even after passing true or false or 'Y' or 'N' or 'Yes' or 'No'. Let us know what is the right way to default this field.

Please find below the screen shot of the field:

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