How to make BlueprintNativeEvent function with Multicast tag

I have a function

//function to call when the pickup is collected

UFUNCTION(BlueprintNativeEvent)

void OnPickedUp(const ACharacter* character);

I wanna make it Multicast function. like as seen below

UFUNCTION(BlueprintNativeEvent, NetMulticast)

void OnPickedUp(const ACharacter* character);

but above declaration makes errors.

How do I make the BlueprintNativeEvent function with Multicast tag.

Help me

Same issue here