I upgraded two ACS SE to version 22.214.171.124.5 to solve this problem TACACS+ Command Accounting does not work.
they were working ok, but the replication between them started to fail.
these are the messages that i receive
ACS Primary: ACS 'backup' has denied replication request.
ACS Backup: Inbound database replication from ACS 'Primary' denied
please help i deeply appreciate..