Web Item can not be found

After upgrade from 7.0 to 7.5 we have in some Web Templates the error message:

Web Item TEXT_TEMPL_KEY could not be found in current Web Application I think it is the same problem like this:

https://wiki.scn.sap.com/wiki/display/BI/Web+Item+LINK_SETTINGS+could+not+be+found+in+current+Web+Application

My problem is I can not find the error in the web template! When I start the query with standard template 0analyze_pattern, there is no warning, so I know that the problem is our own web template. But how can I find the web item where it is used? The Validation of the template Shows no error at all. If I create a web item with this name (and hide it), the warning disappears.

Any help is appreciated!

Chris