'The rule matches no class members for enum in proguard

I have enum decalare as

enum class PARTY {
    START, STOP
}

And in proguard I have added

-keep public enum com.interface.PartyChart$PARTY{
<fields>;
public static **[] values();
public static ** valueOf(java.lang.String);
}

I get this message in proguard file

The rule matches no class members

android proguard

Sources

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Solution	Source