SQL Queries - CAST Management Base - Assign the analysis unit to respective analysis unit module

insert into CMS_ObjectLinks (Caller_Id, Callee_Id, Symbol, Position)
select cpof.Object_Id,
       min(mau.Object_Id),
       'analysisunits',
       0
  from CMS_PORTF_Module cpm
  join CMS_PORTF_ObjectFilter cpof
    on cpof.Module_Id = cpm.Object_Id
  join MAINT_AnalysisUnits mau
    on mau.Object_Name = cpm.Object_Name
   and mau.Active = 1
  where not exists (select 1
                      from CMS_ObjectLinks col
                     where col.Caller_Id = cpof.Object_Id
                       and col.Symbol = 'analysisunits'
                   )
 group by cpof.Object_Id;