Why is it so weird to take compliments?

The other day at work was unusually good at the beginning. Like usually its a dead beginning especially when none of my favorites are there. But I started and someone told me “thank you for always lighting up the place with your positive attitude and personality. It’s nice to get someone nice here”. I’m not used to compliments like I said thank you but I was awkward. If someone knows, how do I fix being thrown off by compliments? Like even at my first job I was painfully awkward too
With compliments
Why is it so weird to take compliments?
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