Healthy weight?

Is 44-45 kg a healthy weight for me? I jave wide curves (hourglass) and height is 156 cm? (5 foot 1) I calculated ideal weight on websites but some say it is underweight anf some say it is not. What should my ideal weight be? Now i weigh 51 kg.

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1 y
But some say 44-45 is underweight*
Healthy weight?
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