hello
some tags are related with the database field
An easy example.
You have Mail_Results as field in your links table, and use
<%Mail_Results%> in your link/detail template.

you decide to remove Mail_Result field from the links table.
The problem you have is:
each template that should generate links (link.html/detailed.html) can't generate this tag because this tag is related to the database field you deleted.

I think, that's the main problem, you have.
the best solution is to re-create this tables again, and eventually set a default.