BOI makes a lot of mistakes in their filmographies.
Forget this, they make mistakes in the release date of films (example being Pati Patni Aur Woh, it was 6th December but they have mentioned 13th December), they have put up the wrong film poster (example, a fan made poster of Bharat is put up where Katrina Kaif isn't in the poster & Commando 2 poster put up for Commando 3).
Heck, Kriti Sanon and Kiara Advani have been credited as actors in Kalank when they just appeared in a song each (Kiara in a few extra mins as Varun's gf).
So this mistake of SRK as a guest appearance in Shakti isn't surprising. They have made many mistakes over the years.
Whether they side a particular actor or not, that's another topic of discussion.