What is alert 8421?

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GMS List Server or GMS Communication Server has just received a request to join a list from someone who is already a member of that list.

In this case, request Undefined asked for Undefined to join the list Undefined. They were already a member of the list so no action was taken.

This is the correct result, no action is required by you.

See Also:

Keywords:join subscribe member 8421

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