Validate not null constraint on user type
What does this MR do and why?
Validate not null constraint on user type. Constraint was introduced in %16.1 No user facing changes here. This is very last step of #386474 (closed)
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #386474 (closed)
Edited by Pavel Shutsin