It might be understandable for others to be forgotten due to the administrative mistake, but it would be intolerable if their own people, who have been associated with the royal family, were forgotten.
Even if Caesar IV had momentarily forgotten due to his busy schedule, there would be someone around to remind him. Jose had been involved with the royal family for so many years, it cannot be possible that he did not have a single friend to speak for him.
After all, he played a significant role in taking the blame. Now that Caesar IV had ascended to the throne, he was supposed to be appropriately taken care of.
Unfortunately, after waiting for such a long time, Caesar IV did nothing, and he had not even met Jose privately.
Perhaps Caesar IV excessively wanted to erase his dark history and did not know how to face Jose, who had witnessed it all. He simply chose to give him the cold shoulder and used time to fade everything away.