No, it should work automaticly.
But we don't know anything about your system. On a clean Joomla with only the official Joomla! templates and JEM this works best.
But sometimes there are interferences with other plugins or templates (not congruent) which are causing such problems. But since now never heard.
My proposal is: to archive and after some time the oldest one to delete. In my case this works perfectly.
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