Is it ok to raise lager temp for a while

I have had two lagers 'lagering' in secondary in my fridge at 40 deg for about a month. I have decided I want to brew another lager but I only have the one fridge, which means I would need to raise the temp to about 55 for a week or so while the new lager ferments, after which I would drop the fridge back to 40 to continue lagering. Would this have any ill effects on the two existing lagers by raising their temp to 55 for a week or 10 days and then dropping them back to 40?

Thanks!

You're already a month in so you are probably OK.