diff -Naur a/lib/private/Updater.php b/lib/private/Updater.php

--- a/lib/private/Updater.php	2020-10-24 10:37:44.000000000 +0200

+++ b/lib/private/Updater.php	2020-11-10 10:51:10.511861549 +0100

@@ -197,14 +197,11 @@

 		}

 		if ($currentVendor === 'nextcloud') {

-			return isset($allowedPreviousVersions[$currentVendor][$majorMinor])

-				&& (version_compare($oldVersion, $newVersion, '<=') ||

-					$this->config->getSystemValue('debug', false));

+			return true;

 		}

 		// Check if the instance can be migrated

-		return isset($allowedPreviousVersions[$currentVendor][$majorMinor]) ||

-			isset($allowedPreviousVersions[$currentVendor][$oldVersion]);

+		return true;

 	}

 	/**