"Add Attribute Index" unique checkbox disabled

[RyanCoodey]

We are using ArcCatalog 10 with an Oracle 10g ArcSDE 9.3.1 database.  When trying to add a new attribute index, the "unique" option is disabled (grayed out).  I see this option is not available for file and SQL Server geodatabases, but it should with Oracle... we have used this in the past.

Any ideas?

Thanks a lot!

[RyanCoodey]

ESRI support helped me out... When creating a new attribute index, the �??unique�?� option is disabled (grayed out) for versioned feature classes.  The only way around this is to make a copy of the feature class (which will not be versioned), delete the original and rename this new one�?� then you must create ALL unique indexes before registering as versioned.

[deleted-user-zpcJw1u0IXiO]

Thanks for posting this. I am curious now, will it work if I simply unregister as versioned before attempting to add the unique attribute index? The feature class resides in a feature dataset with topology, routes, and annotation, and is also 2-way replicated. That's why I hesitate to simply make a copy to have it unversioned. Would these mentioned characteristics (particularly the replica) prevent me from unregistering? Would unregistering break the replica? I don't know what to do.

Thanks,
Justin