diff --git a/plugins/woocommerce/changelog/fix-36473-HPOS-internal-meta-keys b/plugins/woocommerce/changelog/fix-36473-HPOS-internal-meta-keys
new file mode 100644
index 00000000000..bbdc980fa39
--- /dev/null
+++ b/plugins/woocommerce/changelog/fix-36473-HPOS-internal-meta-keys
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Eliminate data store internal meta keys duplicates
diff --git a/plugins/woocommerce/includes/data-stores/class-wc-data-store-wp.php b/plugins/woocommerce/includes/data-stores/class-wc-data-store-wp.php
index c94907bd04d..4df9c42f142 100644
--- a/plugins/woocommerce/includes/data-stores/class-wc-data-store-wp.php
+++ b/plugins/woocommerce/includes/data-stores/class-wc-data-store-wp.php
@@ -108,7 +108,15 @@ class WC_Data_Store_WP {
 	 * @return mixed|void
 	 */
 	public function filter_raw_meta_data( &$object, $raw_meta_data ) {
-		$this->internal_meta_keys = array_merge( array_map( array( $this, 'prefix_key' ), $object->get_data_keys() ), $this->internal_meta_keys );
+		$this->internal_meta_keys = array_unique(
+			array_merge(
+				array_map(
+					array( $this, 'prefix_key' ),
+					$object->get_data_keys()
+				),
+				$this->internal_meta_keys
+			)
+		);
 		$meta_data                = array_filter( $raw_meta_data, array( $this, 'exclude_internal_meta_keys' ) );
 		return apply_filters( "woocommerce_data_store_wp_{$this->meta_type}_read_meta", $meta_data, $object, $this );
 	}