Fixed Colors - Lens flare?

This looks much better or I should say looks as it should for a building of this material. I was unclear whether the problem lies with the slide or simply in the scanner setting. If the slide is magenta then presumably there is no means of rescuing the slide but it begs the question of what would make a slide this colour. I did very little slide work but have never seen this effect on a slide

'Magenta' cast usually means 'Latent Image Regression' because the film was left un-processed for too long.