diff --git a/plugins/woocommerce/changelog/fix-34677 b/plugins/woocommerce/changelog/fix-34677
new file mode 100644
index 00000000000..8d54ce0298c
--- /dev/null
+++ b/plugins/woocommerce/changelog/fix-34677
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Do no override order defaults with NULL values (HPOS)
diff --git a/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php b/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php
index 8fa8a94fe0f..dae05bd5893 100644
--- a/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php
+++ b/plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php
@@ -836,6 +836,9 @@ SELECT type FROM {$this->get_orders_table_name()} WHERE id = %d;
 				}
 
 				$prop_value = $order_data->{$prop_details['name']};
+				if ( is_null( $prop_value ) ) {
+					continue;
+				}
 
 				if ( 'date' === $prop_details['type'] ) {
 					$prop_value = $this->string_to_timestamp( $prop_value );