Each primary database in a replication system includes a database generation number. This number is stored both in the database and in the RSSD of the Replication Server that manages the database.
Any time you load a primary database for recovery, you must change the database generation number, as instructed in the recovery procedure you are using.
The maximum value for the database generation number is 65,535. Sybase recommends that you do not increase the number to high values unless absolutely necessary. In Replication Server 15.5 and later, you can reset the database generation number to 0 before it reaches the maximum of 65,535. In Replication Server versions earlier than 15.5, you must rebuild the replication environment after resetting the database generation number.
See Resetting Primary Database Generation Number in the Replication Server Administration Guide Volume 2.