Step 1:
Go to gameserver/data/onedayreward – there you will find what you want to modify based on the id.
Step 2:
Open the system folder of the client with a text editor and locate the onedayreward file.
In gameserver/data/onedayreward, you will see IDs that correspond to the ones in the client file.
You must make all the same changes there as well.