160555: Multigeneration replicas are only supported on versioned workspaces.

Description

This error occurs when trying to create a two-way replica in a geodatabase that does not support two-way replication.

Solution

When creating a two-way replica, ensure that the destination geodatabase is an enterprise geodatabase. If you do not want to replicate to an enterprise geodatabase, consider using one-way replication or checkout/check-in replication.