Legally, I have no idea. I think it sounds like just a simple mistake and you told your manager which was the right thing to do. I doubt she will take any legal action against you for a little mistake.
Try not to be so hard on yourself

things like this happen.
I've broken plenty of things at my jobs
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Allie
Diagnosed: Generalized Anxiety Disorder & Obsessive Compulsive Disoder. Previous: Borderline Personality Disorder.
I no longer qualify for a diagnosis of Borderline Personality Disorder, but there will always be my borderline traits that I struggle with especially during times of great stress.
I've been working passionately as a therapist since December 2016
