contao 4.5.6 "InvalidFieldNameException" was tun?

Nachdem ich meine Testinstallation via Manager erfolgreich aufgesetzt hatte(Details hier ab#4), gibt es nun einen Fehler zu dessen Lösung ich auch mit meiner Recherche nicht weiterkomme.

Das Frontend zeigt das Template @ContaoCore/Error/error.html.twig, der Aufruf im Debugmodus dann:

HTML-Code:

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PDOException PDOException InvalidFieldNameException
HTTP 500 Internal Server Error
An exception occurred while executing 'SELECT tl_module.*, j1.`id` AS jumpTo__id, j1.`pid` AS jumpTo__pid, j1.`sorting` AS jumpTo__sorting, j1.`tstamp` AS jumpTo__tstamp, j1.`title` AS jumpTo__title, j1.`alias` AS jumpTo__alias, j1.`type` AS jumpTo__type, j1.`pageTitle` AS jumpTo__pageTitle, j1.`language` AS jumpTo__language, j1.`robots` AS jumpTo__robots, j1.`description` AS jumpTo__description, j1.`redirect` AS jumpTo__redirect, j1.`jumpTo` AS jumpTo__jumpTo, j1.`redirectBack` AS jumpTo__redirectBack, j1.`url` AS jumpTo__url, j1.`target` AS jumpTo__target, j1.`dns` AS jumpTo__dns, j1.`staticFiles` AS jumpTo__staticFiles, j1.`staticPlugins` AS jumpTo__staticPlugins, j1.`fallback` AS jumpTo__fallback, j1.`adminEmail` AS jumpTo__adminEmail, j1.`dateFormat` AS jumpTo__dateFormat, j1.`timeFormat` AS jumpTo__timeFormat, j1.`datimFormat` AS jumpTo__datimFormat, j1.`validAliasCharacters` AS jumpTo__validAliasCharacters, j1.`createSitemap` AS jumpTo__createSitemap, j1.`sitemapName` AS jumpTo__sitemapName, j1.`useSSL` AS jumpTo__useSSL, j1.`autoforward` AS jumpTo__autoforward, j1.`protected` AS jumpTo__protected, j1.`groups` AS jumpTo__groups, j1.`includeLayout` AS jumpTo__includeLayout, j1.`layout` AS jumpTo__layout, j1.`mobileLayout` AS jumpTo__mobileLayout, j1.`includeCache` AS jumpTo__includeCache, j1.`cache` AS jumpTo__cache, j1.`clientCache` AS jumpTo__clientCache, j1.`includeChmod` AS jumpTo__includeChmod, j1.`cuser` AS jumpTo__cuser, j1.`cgroup` AS jumpTo__cgroup, j1.`chmod` AS jumpTo__chmod, j1.`noSearch` AS jumpTo__noSearch, j1.`requireItem` AS jumpTo__requireItem, j1.`cssClass` AS jumpTo__cssClass, j1.`sitemap` AS jumpTo__sitemap, j1.`hide` AS jumpTo__hide, j1.`guests` AS jumpTo__guests, j1.`tabindex` AS jumpTo__tabindex, j1.`accesskey` AS jumpTo__accesskey, j1.`published` AS jumpTo__published, j1.`start` AS jumpTo__start, j1.`stop` AS jumpTo__stop FROM tl_module LEFT JOIN tl_page j1 ON tl_module.`jumpTo`=j1.id WHERE tl_module.id IN(21,2,10,0,0,0,0,4,20,5,1,0,0,11,6,17,6,8) ORDER BY FIND_IN_SET(`tl_module`.`id`, '21,2,10,0,0,0,0,4,20,5,1,0,0,11,6,17,6,8')':

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'j1.validAliasCharacters' in 'field list'

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Das habe ich getan:

1.
Contao 4.4 installiert, via Manager auf 4.5 upgegraded,

2.
ein altes 3.5 Theme eingebunden ohne Erweiterungen, beim Aufruf im FE Fehlermeldung j_slider.html Template fehlt,

3.
Template aus einer alten 3.5 in den Theme-Template-Ordner kopiert, keine Änderung

4.
im Manager alles an Cache neu aufbauen lassen,

5.
Install-Tool aufgerufen und Datenbank aktualisiert (das war möglicherweise ein Fehler)

6.
Im Manager den Debug-Modus aktiviert


wie kann ich das jetzt fixen und vor allem: wie kann ich das in Zukunft vermeiden? Danke für Tipps und Hinweise