Version 5.0.0 release

applications/core/modules/setup/upgrade/login.php

@@ -51,6 +51,13 @@ class login extends Controller
 	 */
 	protected static int $minimumv5 = 5000015;
 
+	/**
+	 * Minimum version from which we allow an upgrade
+	 *
+	 * @var int
+	 */
+	protected static int $minimumBaseVersion = 105013;
+
 	/**
 	 * Show login form and/or process login form
 	 *
@@ -111,6 +118,14 @@ class login extends Controller
 		$canUpgrade = FALSE;
 		$currentBaseVersion = Db::i()->select( 'app_long_version', 'core_applications', [ 'app_directory=?', 'core' ] )->first();
 
+		/* If we are upgrading from a verison earlier than 4.5, stop here */
+		if( $currentBaseVersion < static::$minimumBaseVersion )
+		{
+			Output::i()->output .= Theme::i()->getTemplate( 'global' )->block( 'applications', Theme::i()->getTemplate( 'forms' )->minversioncheck() );
+			Upgrade::setUpgradingFlag( FALSE );
+			return;
+		}
+
 		/* If we are upgrading from a version earlier than v5, disable and lock anything that isn't 1st party */
 		if( $currentBaseVersion < static::$minimumv5 )
 		{