Database Error: You must use the "set" method to update an entry.

[eluser]Bl4cKWid0w[/eluser]
I have a bunch of functions on this page. When I visit a certain function, I get an error that says:

You must use the "set" method to update an entry.

This error only occurs when I visit this function, however, this function doesn't update any database entries. It only inserts new information into the database. And it doesn't occur when I visit functions that do update database information.

It does not say which line of the file the error is occurring on, so this makes it even more difficult to fix.

Any ideas?