Sql doesn't match xml anymore suddenly after replacing a backup of the sql-files (in which nothing changed but the characters.sql 
and accounts.sql

Errors like this for all the xml-files:

Error in file C:\L2J-server\data\stats\weapon\9126_imperial_crusader_shield.xml java.lang.NullPointerExceptionat net.sf.l2j.gameserver.skills.DocumentItem.parseItem<DocumentItem.java:116>