Emacs does not remember custom theme settings

After adding the following line to <quote>init.el</quote> <code> (load-theme 'solarized-dark) </code> Emacs asks the following 2 questions on every start: <cite>Loading a theme can run Lisp code. Really load (y or n)</cite> <cite>Treat this theme as safe in future sessions? (y or n)</cite> Answering both questions with "y" does have no effect, Emacs doesn't remember previous decisions.
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