I have multiple issues with specific labels for example say "X_Required", "Y_Required", "Z_Required" so on and most of them are without labels.
Now I want to write a JQL such that it removes all the issues with label "X_Required" and "Z_Required". The result should show only those issues which has no labels and "Y_Required". To do that I write something as this
labels not in (X_Required, Z_Required)
but this also removes issues without labels.