Metatag editing

I am working on setting up metatags. The title for my main page works well. I went on to my category pages. I only got as far as the title of my first category. I made a type-o, and have yet to figure out how to edit the mistake. When I open the metatag link from the categories in the admin, my mistake is in the title field. When I correct it and try to save, I get the following error.

1062 Duplicate entry '6-1' for key 1
in:
[insert into meta_tags_categories_description (metatags_title, metatags_keywords, metatags_description, categories_id, language_id) values ('', '', '', '6', '1')]
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

I tried going back and entering all three fields but I get the same error.

Is there another place to edit metatags in the admin?

I then seached the forum and found some reference of where to find the file with the code for the metatags. I tried to find the file which contains the code, but have not been able to do so. I can find the file which contains the title for my main page, but not the first category page.

I am new to Zen Cart. I am becoming pretty familiar with the admin, but I am not a programmer and did not do the initial install of the cart. I am able to do a bit with code but not much. I do know that I have 1.3.0.

Thanks

I was able to find the place to edit the tag witht he help of the installer.

I didn't realize that there was a whole other place to look; in the database on the server. We were able to access it this way and fix my type-o.

Issue resolved.
Thanks