Hi Nivas M,

Try adding the below context in your second action,

<field name="context">{'edit': 0,'create': 0}</field>
Eg:

<record id="action_resignation_stages" model="ir.actions.act_window">
<field name="name">Overview</field>
<field name="type">ir.actions.act_window</field>
<field name="res_model">hr.resignation.stage</field>
<field name="view_mode">kanban</field>
<field name="context">{'edit': 0,'create': 0}</field>
</record>

Hope it Helps,
Kiran K