diff --git a/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.test.tsx b/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.test.tsx
index f78766e593373..7cb2553bf4ddd 100644
--- a/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.test.tsx
+++ b/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.test.tsx
@@ -28,6 +28,37 @@ describe('HeaderButtons', () => {
     expect(getByTestId('siemMigrationsSelectMigrationButton')).toBeInTheDocument();
   });
 
+  it('marks only the option with the selected migration id as selected when names are duplicated', () => {
+    const [first, second] = getMigrationsStatsMock();
+    const migrationsWithDuplicateNames = [
+      { ...first, name: 'Same name', id: '1' },
+      { ...second, name: 'Same name', id: '2' },
+    ];
+
+    const { getByTestId } = render(
+      <TestProviders>
+        <HeaderButtons
+          migrationType="dashboard"
+          migrationsStats={migrationsWithDuplicateNames}
+          selectedMigrationId="1"
+          onMigrationIdChange={onMigrationIdChange}
+        />
+      </TestProviders>
+    );
+
+    const siemMigrationsSelectMigrationButton = getByTestId('siemMigrationsSelectMigrationButton');
+    const comboBoxToggleListButton = within(siemMigrationsSelectMigrationButton).getByTestId(
+      'comboBoxToggleListButton'
+    );
+    fireEvent.click(comboBoxToggleListButton);
+
+    const option1 = getByTestId('migrationSelectionOption-1');
+    const option2 = getByTestId('migrationSelectionOption-2');
+
+    expect(option1).toHaveAttribute('aria-selected', 'true');
+    expect(option2).toHaveAttribute('aria-selected', 'false');
+  });
+
   it('calls onMigrationIdChange when a migration is selected', () => {
     const { getByTestId, getByText } = render(
       <TestProviders>
diff --git a/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.tsx b/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.tsx
index 5efbca8c07309..74e46939144c9 100644
--- a/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.tsx
+++ b/x-pack/solutions/security/plugins/security_solution/public/siem_migrations/common/components/header_buttons/index.tsx
@@ -31,6 +31,7 @@ export const SIEM_MIGRATIONS_SELECT_MIGRATION_BUTTON_ID = 'siemMigrationsSelectM
 const migrationStatsToComboBoxOption = (
   stats: MigrationTaskStats
 ): EuiComboBoxOptionOption<string> => ({
+  key: stats.id,
   value: stats.id,
   label: stats.name,
   'data-test-subj': `migrationSelectionOption-${stats.id}`,
@@ -60,8 +61,10 @@ export const HeaderButtons: React.FC<HeaderButtonsProps> = React.memo(
     const migrationVendor = useMemo(() => selectedMigrationStats?.vendor, [selectedMigrationStats]);
 
     const selectedMigrationOption = useMemo<Array<EuiComboBoxOptionOption<string>>>(() => {
-      return selectedMigrationStats ? [migrationStatsToComboBoxOption(selectedMigrationStats)] : [];
-    }, [selectedMigrationStats]);
+      if (!selectedMigrationId) return [];
+      const selected = migrationOptions.find((opt) => opt.value === selectedMigrationId);
+      return selected ? [selected] : [];
+    }, [migrationOptions, selectedMigrationId]);
 
     const onChange = (selected: Array<EuiComboBoxOptionOption<string>>) => {
       onMigrationIdChange(selected[0].value);