Welcome to the Fitbit Community, @Fudawei.
I am sorry to hear about your mistake inputting water consumption. I am here to help. You can follow these steps to edit or delete your water log:
For more information, see How do I track my water intake in the Fitbit app?
Let me know how it goes. I'll be around if you have any questions.
Want to discuss ways to increase your activity? Visit Get Moving in the Lifestyle Discussion Forum.
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