Is there someone in the extended stake presidency (stake presidency, clerks, assistant clerks, executive secretary) that belongs to your ward? Have them change it back.
Currently, you can't see it because it's awaiting approval by a stake admin. I'm not sure what happens if they reject it. If a admin tries to change it back, it becomes a calendar in their ward. That's why I asked if there was someone in you ward who would be a default stake admin.
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