Custom attributes are not visible for Manage survivorship rules task

Summary:

I'm trying to use custom attribute in manage survivorship rule task for set master record but the custom attributes are not available for selection whereas oracle document suggests we can select custom attributes.

Ref Doc.

https://docs.oracle.com/en/cloud/saas/sales/oacdm/example-of-defining-set-master-record-rules-for-parties-with.html#s20056645

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