diff --git a/includes/admin/class-wc-admin-status.php b/includes/admin/class-wc-admin-status.php
index be40b97270a..1cd17ed058e 100644
--- a/includes/admin/class-wc-admin-status.php
+++ b/includes/admin/class-wc-admin-status.php
@@ -339,6 +339,29 @@ class WC_Admin_Status {
 		}
 	}
 
+	/**
+	 * Prints table info if a base table is not present.
+	 */
+	private static function output_tables_info() {
+		$missing_tables = WC_Install::verify_base_tables( false );
+		if ( 0 === count( $missing_tables ) ) {
+			return;
+		}
+		?>
+
+		<br>
+		<strong style="color:#a00;">
+			<span class="dashicons dashicons-warning"></span>
+			<?php
+				esc_html_e( 'Missing base tables: ', 'woocommerce' );
+				echo esc_html( implode( ', ', $missing_tables ) );
+				esc_html_e( '. Some WooCommerce functionality may not work as expected.', 'woocommerce' );
+			?>
+		</strong>
+
+		<?php
+	}
+
 	/**
 	 * Prints the information about plugins for the system status report.
 	 * Used for both active and inactive plugins sections.
diff --git a/includes/admin/views/html-admin-page-status-report.php b/includes/admin/views/html-admin-page-status-report.php
index 27028417549..47209926a39 100644
--- a/includes/admin/views/html-admin-page-status-report.php
+++ b/includes/admin/views/html-admin-page-status-report.php
@@ -496,10 +496,17 @@ $untested_plugins   = $plugin_updates->get_untested_plugins( WC()->version, 'min
 		?>
 	</tbody>
 </table>
-<table class="wc_status_table widefat" cellspacing="0">
+<table id="status-database" class="wc_status_table widefat" cellspacing="0">
 	<thead>
 	<tr>
-		<th colspan="3" data-export-label="Database"><h2><?php esc_html_e( 'Database', 'woocommerce' ); ?></h2></th>
+		<th colspan="3" data-export-label="Database">
+			<h2>
+				<?php
+					esc_html_e( 'Database', 'woocommerce' );
+					self::output_tables_info();
+				?>
+			</h2>
+		</th>
 	</tr>
 	</thead>
 	<tbody>
diff --git a/includes/class-wc-install.php b/includes/class-wc-install.php
index 71d5d0a5d20..cd69608b2ac 100644
--- a/includes/class-wc-install.php
+++ b/includes/class-wc-install.php
@@ -994,8 +994,8 @@ CREATE TABLE {$wpdb->prefix}wc_reserved_stock (
 	`order_id` bigint(20) NOT NULL,
 	`product_id` bigint(20) NOT NULL,
 	`stock_quantity` double NOT NULL DEFAULT 0,
-	`timestamp` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
-	`expires` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
+	`timestamp` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
+	`expires` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
 	PRIMARY KEY  (`order_id`, `product_id`)
 ) $collate;
 		";
diff --git a/src/Checkout/Helpers/ReserveStock.php b/src/Checkout/Helpers/ReserveStock.php
index b882cf83906..32dff1c5c43 100644
--- a/src/Checkout/Helpers/ReserveStock.php
+++ b/src/Checkout/Helpers/ReserveStock.php
@@ -13,6 +13,31 @@ defined( 'ABSPATH' ) || exit;
  * Stock Reservation class.
  */
 final class ReserveStock {
+
+	/**
+	 * Is stock reservation enabled?
+	 *
+	 * @var boolean
+	 */
+	private $enabled = true;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct() {
+		// Table needed for this feature are added in 4.3.
+		$this->enabled = get_option( 'woocommerce_schema_version', 0 ) >= 430;
+	}
+
+	/**
+	 * Is stock reservation enabled?
+	 *
+	 * @return boolean
+	 */
+	protected function is_enabled() {
+		return $this->enabled;
+	}
+
 	/**
 	 * Query for any existing holds on stock for this item.
 	 *
@@ -24,6 +49,10 @@ final class ReserveStock {
 	public function get_reserved_stock( \WC_Product $product, $exclude_order_id = 0 ) {
 		global $wpdb;
 
+		if ( ! $this->is_enabled() ) {
+			return 0;
+		}
+
 		// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQL.NotPrepared
 		return (int) $wpdb->get_var( $this->get_query_for_reserved_stock( $product->get_stock_managed_by_id(), $exclude_order_id ) );
 	}
@@ -39,7 +68,7 @@ final class ReserveStock {
 	public function reserve_stock_for_order( \WC_Order $order, $minutes = 0 ) {
 		$minutes = $minutes ? $minutes : (int) get_option( 'woocommerce_hold_stock_minutes', 60 );
 
-		if ( ! $minutes ) {
+		if ( ! $minutes || ! $this->is_enabled() ) {
 			return;
 		}
 
@@ -95,6 +124,10 @@ final class ReserveStock {
 	public function release_stock_for_order( \WC_Order $order ) {
 		global $wpdb;
 
+		if ( ! $this->is_enabled() ) {
+			return;
+		}
+
 		$wpdb->delete(
 			$wpdb->wc_reserved_stock,
 			array(
@@ -124,9 +157,10 @@ final class ReserveStock {
 		$result = $wpdb->query(
 			$wpdb->prepare(
 				"
-				REPLACE INTO {$wpdb->wc_reserved_stock} ( order_id, product_id, stock_quantity, expires )
-				SELECT %d, %d, %d, ( NOW() + INTERVAL %d MINUTE ) from DUAL
+				INSERT INTO {$wpdb->wc_reserved_stock} ( `order_id`, `product_id`, `stock_quantity`, `timestamp`, `expires` )
+				SELECT %d, %d, %d, NOW(), ( NOW() + INTERVAL %d MINUTE ) FROM DUAL
 				WHERE ( $query_for_stock FOR UPDATE ) - ( $query_for_reserved_stock FOR UPDATE ) >= %d
+				ON DUPLICATE KEY UPDATE `expires` = VALUES( `expires` )
 				",
 				$order->get_id(),
 				$product_id,