diff --git a/mailpoet/lib/Migrations/Migration_20221110_151621.php b/mailpoet/lib/Migrations/Migration_20221110_151621.php
index 4e30a7ddf0..d0c1ed9e8d 100644
--- a/mailpoet/lib/Migrations/Migration_20221110_151621.php
+++ b/mailpoet/lib/Migrations/Migration_20221110_151621.php
@@ -16,8 +16,8 @@ class Migration_20221110_151621 extends Migration {
         name varchar(255) NOT NULL,
         author bigint NOT NULL,
         status varchar(255) NOT NULL,
-        created_at timestamp NOT NULL,
-        updated_at timestamp NOT NULL,
+        created_at timestamp NULL, -- must be NULL, see comment at the top
+        updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
         activated_at timestamp NULL,
         deleted_at timestamp NULL,
         PRIMARY KEY (id)
@@ -29,8 +29,8 @@ class Migration_20221110_151621 extends Migration {
         id int(11) unsigned NOT NULL AUTO_INCREMENT,
         automation_id int(11) unsigned NOT NULL,
         steps longtext,
-        created_at timestamp NOT NULL,
-        updated_at timestamp NOT NULL,
+        created_at timestamp NULL, -- must be NULL, see comment at the top
+        updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
         PRIMARY KEY (id),
         INDEX (automation_id)
       ) {$charsetCollate};
@@ -51,8 +51,8 @@ class Migration_20221110_151621 extends Migration {
         version_id int(11) unsigned NOT NULL,
         trigger_key varchar(255) NOT NULL,
         status varchar(255) NOT NULL,
-        created_at timestamp NOT NULL,
-        updated_at timestamp NOT NULL,
+        created_at timestamp NULL, -- must be NULL, see comment at the top
+        updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
         subjects longtext,
         next_step_id varchar(255),
         PRIMARY KEY (id),
diff --git a/mailpoet/tests/integration/API/JSON/v1/SetupTest.php b/mailpoet/tests/integration/API/JSON/v1/SetupTest.php
index b1bb37e3c4..1ee75b167c 100644
--- a/mailpoet/tests/integration/API/JSON/v1/SetupTest.php
+++ b/mailpoet/tests/integration/API/JSON/v1/SetupTest.php
@@ -16,6 +16,15 @@ use MailPoet\Settings\SettingsRepository;
 use MailPoet\Subscription\Captcha;
 use MailPoet\WP\Functions as WPFunctions;
 
+/**
+ * The "created_at" column must be NULL in some tables to avoid "there can be only one
+ * TIMESTAMP column with CURRENT_TIMESTAMP" error on MySQL version < 5.6.5 that occurs
+ * even when other timestamp is simply "NOT NULL".
+ *
+ * Additionally, having multiple timestamp columns with "NOT NULL" seems to produce the
+ * following error in some SQL modes:
+ *   SQLSTATE[42000]: Syntax error or access violation: 1067 Invalid default value for 'updated_at'"
+ */
 class SetupTest extends \MailPoetTest {
   public function _before() {
     parent::_before();