diff --git a/admin/admin.php b/admin/admin.php
index 189ca3d9..6c6dfcd0 100644
--- a/admin/admin.php
+++ b/admin/admin.php
@@ -21,9 +21,15 @@
 
 function veu_common_options_init() {
 	register_setting(
-		'vkExUnit_common_options_fields',   //  Immediately following form tag of edit page.
+		'vkExUnit_common_options_fields',   // Immediately following form tag of edit page.
 		'vkExUnit_common_options',          // name attr
-		'veu_common_options_validate'
+		array(
+			'type'              => 'array',
+			'description'       => 'vkExUnit common options',
+			'sanitize_callback' => 'veu_common_options_validate',
+			'show_in_rest'      => false,
+			'default'           => veu_get_common_options_default(),
+		)
 	);
 }
 add_action( 'admin_init', 'veu_common_options_init' );
diff --git a/initialize.php b/initialize.php
index 85454985..53eb2726 100644
--- a/initialize.php
+++ b/initialize.php
@@ -39,17 +39,6 @@ function veu_load_packages(){
 	require_once VEU_DIRECTORY_PATH . '/inc/common-block.php';
 	require VEU_DIRECTORY_PATH . '/inc/footer-copyright-change.php';
 	veu_package_include(); // package_manager.php
-
-	// vkExUnit_common_options initialize
-	register_setting(
-		'options',
-		'vkExUnit_common_options',
-		array(
-			'type'              => 'array',
-			'sanitize_callback' => null,
-			'default'           => veu_get_common_options_default(),
-		)
-	);
 }
 add_action( 'after_setup_theme', 'veu_load_packages' );
 
diff --git a/readme.txt b/readme.txt
index 6a2b705f..39833ee0 100644
--- a/readme.txt
+++ b/readme.txt
@@ -81,6 +81,8 @@ e.g.
 
 == Changelog ==
 
+[ Bug Fix ] Fixed a PHP error that occurs when the activation settings have never been saved.
+
 = 9.100.3 =
 [ Bug Fix ][ CSS Customize ] Fixed an issue where CSS customizations were not applied on single page.