It is really challenging for me to guess your intention. On one particular hand you might be saying that both a and b are community (no leading underscore of their names) so I must theoretically be allowed to entry/mutate (get/established) the two. But Then you definately specify an express mutator https://aiplgurugram.co.in/aipl-lake-city-sector-103-gurgaon-a-haven-for-modern-families/