There's plenty of cases where novel statements get retconned by other, C-canon sources, even leaving aside that one. In RoTJ, the novel states the DS2 is "nearly twice as big" as was the DS1- it ended up being more than 5x the diameter. In TPM, the novel states Darth Bane worked alone for a while after the death of all the other Sith, then recruited a male apprentice to carry on the Sith Order. In Jedi vs Sith, he recruits a female apprentice immediately after the Battle of Ruusan. In RoTS, the novel states the ship Bail Organa rescues Yoda in, was the Tantive IV- later sources say it was the Sundered Heart. And so forth.