@Handian Sudianto, Thanks for posting in Q&A. In general, Conflicts can happen when different policies update the same setting to different values.
https://learn.microsoft.com/en-us/mem/intune/configuration/device-profile-troubleshoot#conflicts
From the pictures you provided, I find the following two settings has conflict with policy "Restrict USB devices". This is because the same settings are configured in both policies.
Please unassign the user or device group from any of the two policies to let it only apply one policy.
Hope the above information can help.
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