1 files changed, 9 insertions, 0 deletions
diff --git a/phpBB/phpbb/install/module/update_database/task/update.php b/phpBB/phpbb/install/module/update_database/task/update.php
index 84ec6f73f5..eb9bdc8138 100644
--- a/phpBB/phpbb/install/module/update_database/task/update.php
+++ b/phpBB/phpbb/install/module/update_database/task/update.php
@@ -139,6 +139,15 @@ class update extends task_base
 			->extension_directory('/migrations')
 			->get_classes();
 
+		// Unset classes that are not a valid migration
+		foreach ($migrations as $key => $migration_class)
+		{
+			if (\phpbb\db\migrator::is_migration($migration_class) === false)
+			{
+				unset($migrations[$key]);
+			}
+		}
+
 		$this->migrator->set_migrations($migrations);
 		$migration_count = count($migrations);
 		$this->iohandler->set_task_count($migration_count, true);