Product Build Number
SQL Server Database Engine
The merge process was unable to change generation history at the '%1'. When troubleshooting, restart the synchronization with verbose history logging and specify an output file to which to write.
To resolve the issue:
Decrease the value of the -DownloadGenerationsPerBatch and -UploadGenerationsPerBatch parameters for the Merge Agent to allow processing to continue while you address the underlying issue causing the error. Agent parameters can be specified in agent profiles and on the command line. For more information, see:
Specify the lowest setting possible for the publication retention period. For more information, see Subscription Expiration and Deactivation.
As part of maintenance for merge replication, occasionally check the growth of the system tables associated with merge replication: MSmerge_contents, MSmerge_genhistory, and MSmerge_tombstone, MSmerge_current_partition_mappings, and MSmerge_past_partition_mappings. Periodically re-index these tables. For more information, see Reorganizing and Rebuilding Indexes.