>>91475800They didn't want to keep her around. They wanted her to apologize for claiming that management privated the MV and to claim that she herself had privated it, so as to restore their reputation and ruin her own.
The fact that management actually had privated the video is besides the point. The point is that they felt that people thinking that management took down the MV would be damaging to the company's reputation, and they felt the need to punish her for making people think that.
The plan was to make her take the blame for taking down the MV, and then fire her anyway.
See also management making Petra keep the Riku worship scene in her 3D debut, and then making her claim that it was 100% her idea to keep that scene in her 3D.