Hi, I'm uysing Joomla 1.5.23.

When I try to make same changes to the template it gives this error:

500 - An error has occurred:  JooDatabase needs a index-,title- and maintextfield.

Indeed, in the general options page the title field (one of the three fundamental fields) is blank. However, it does not allow me to edit this field. I guess it should be appear automatically from the table. I would greatly appreciate if someone can help me out in workaround this issue. Thank you!

My table is 

mysql> CREATE TABLE jos_publications (

     -> authors VARCHAR(500),

    -> title VARCHAR(500),

    -> journal VARCHAR(500),

    -> volume VARCHAR(20),

    -> page VARCHAR(20),

    -> date DATE,

    -> abstract TEXT,

    -> link VARCHAR(500),

    -> thumb VARCHAR(500),

    -> id INT

    -> );