My guess is that you have multiple Azure AD groups that share the same displayName, haven't you?
As per Atlassian's documentation
In Azure AD, you can have multiple groups with the same name (displayName), but it's not supported in Crowd and results in a failing synchronization. Make sure you change your Azure AD group names to unique ones.
Hello everyone, Hope everyone is safe! A few months ago we posted an article sharing all the new articles and documentation that we, the AMER Jira Service Management team created. As mentioned ...
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