After you run installmaster, installmodel, installcommit, installsecurity, installhasvss, installjsdb, and installmsgsvss on your downgraded server, any changed system stored procedures are returned to their earlier form. Any new stored procedures introduced to Adaptive Server in releases subsequent to the downgraded server are not removed. Attempts to execute such stored procedures against an older binary have unpredictable results.
Installing system stored procedures drops audit information about the system stored procedures. You should reenable auditing for all system stored procedures for which auditing was enabled before downgrade. Use the output of sp_displayaudit recorded during pre-downgrade to help determine the system stored procedures for which auditing was enabled. Reenter the audit options using sp_audit. For example, if you had enabled stored procedure auditing for sp_addlogin stored procedure in your server before upgrade, run the following sp_audit command to reenable auditing on sp_addlogin:
sp_audit "exec_procedure", "all", "sp_addlogin", "on"
