diff --git a/mailpoet/RoboFile.php b/mailpoet/RoboFile.php
index 3f33f235a0..f5a7b344be 100644
--- a/mailpoet/RoboFile.php
+++ b/mailpoet/RoboFile.php
@@ -448,12 +448,13 @@ class RoboFile extends \Robo\Tasks {
   }
 
   /**
-   * Creates a new migration file. Creates Db level migration. Use --level=App to create an application level migration.
-   * @param $opts array{level: string}
+   * Creates a new migration file. Use `migrations:new db` for a Db level migration or `migrations:new app` for App level migration.
+   * @param $level string - db or app
    */
-  public function migrationsNew($opts = ['level' => \MailPoet\Migrator\Repository::MIGRATIONS_LEVEL_DB]) {
+  public function migrationsNew($level) {
     $generator = new \MailPoet\Migrator\Repository();
-    $result = $generator->create($opts['level']);
+    $level = ucfirst(strtolower($level));
+    $result = $generator->create($level);
     $path = realpath($result['path']);
     $this->output->writeln('MAILPOET DATABASE MIGRATIONS');
     $this->output->writeln("============================\n");
diff --git a/mailpoet/lib/Migrator/MigratorException.php b/mailpoet/lib/Migrator/MigratorException.php
index 619aaa206a..d724c767b3 100644
--- a/mailpoet/lib/Migrator/MigratorException.php
+++ b/mailpoet/lib/Migrator/MigratorException.php
@@ -12,6 +12,12 @@ class MigratorException extends InvalidStateException {
     );
   }
 
+  public static function invalidMigrationLevel(string $level): self {
+    return self::create()->withMessage(
+      sprintf('Migration level "%s" is not supported! Use "App" of "Db".', $level)
+    );
+  }
+
   public static function migrationFileWriteFailed(string $path): self {
     return self::create()->withMessage(
       sprintf('Could not write migration file "%s".', $path)
diff --git a/mailpoet/lib/Migrator/Repository.php b/mailpoet/lib/Migrator/Repository.php
index 4e66196979..7298496725 100644
--- a/mailpoet/lib/Migrator/Repository.php
+++ b/mailpoet/lib/Migrator/Repository.php
@@ -27,6 +27,9 @@ class Repository {
 
   /** @return array{name: string, path: string} */
   public function create(string $level): array {
+    if (!in_array($level, [self::MIGRATIONS_LEVEL_APP, self::MIGRATIONS_LEVEL_DB], true)) {
+      throw MigratorException::invalidMigrationLevel($level);
+    }
     $templateFile = str_replace('{level}', $level, $this->templateFile);
     $template = @file_get_contents($templateFile);
     if (!$template) {
diff --git a/mailpoet/tests/unit/Migrator/RepositoryTest.php b/mailpoet/tests/unit/Migrator/RepositoryTest.php
index 0d631d03bd..5271569b55 100644
--- a/mailpoet/tests/unit/Migrator/RepositoryTest.php
+++ b/mailpoet/tests/unit/Migrator/RepositoryTest.php
@@ -47,6 +47,18 @@ class RepositoryTest extends MailPoetUnitTest {
     $repository->create(Repository::MIGRATIONS_LEVEL_DB);
   }
 
+  public function testItFailsCreatingLevelIsInvalid(): void {
+    $migrationsDir = __DIR__ . '/TestMigrations';
+    $repository = $this->make(Repository::class, [
+      'migrationsDir' => $migrationsDir,
+      'templateFile' => self::TEMPLATE_FILE,
+    ]);
+
+    $this->expectException(MigratorException::class);
+    $this->expectExceptionMessage(sprintf('Migration level "%s" is not supported! Use "App" of "Db".', 'abc'));
+    $repository->create('abc');
+  }
+
   public function testItLoadsMigrationFiles(): void {
     $repository = $this->make(Repository::class, [
       'migrationsDir' => __DIR__ . '/TestMigrations',