A host name change can trigger the change of the SQL Server address
If SQL Server is located on the same computer as the management server, and the name of this computer is changed, the address of SQL Server will change as well. This means that the SQL Server address will have to be updated for components located on different computers as well as for components on the local computer that use the computer name rather than localhost to connect to SQL Server. This specifically applies to the Event Server which uses the same database as the Management Server. It might also apply to the Log Server which uses a different database but very likely on the same SQL Server.