Oh, Yes You are right! I have forgotten the step to Wipe/Format-User-Data before rooting! Do You know, is it possible to Wipe/Format-User-Data AFTER root, to enable possibility to make Backups also of the Data-Partition!?
If you format data now, you will lose your datas and root too. So you must root and follow instruction for Themes and Histen again.
Backup your infos and perform procedure again. This time root just after formating data. You may not reboot between them