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XF 1.2 Reverting a post

So I merged two posts in the same thread and then tried to revert using the History edit and I get this error:

"Security error occurred. Please press back, refresh the page, and try again."

Can anyone suggest what I need to change to fix this?


XenForo developer
Staff member
Is your style customized at all? That would be the first place I'd check.

Alternatively, it could potentially be something like mod_security or the like removing input.