Check_MK Werk 5304: mssql_backup: Fixed error if existing rule has been set before 1.5.0

ID: 5304 Title: mssql_backup: Fixed error if existing rule has been set before 1.5.0 Component: Checks & agents Level: 1 Class: Bug fix Version: 1.5.0i1 In werk #4811 the ruleset for mssql_backup has been extended. Since then the GUI would crash if a rule has been set up previously to this update. This has been fixed now.