Hi,

i AM GETTING THE BELOW ERROR when trying to save a record.

There were custom validation error(s) encountered while saving the affected record(s). The first validation error encountered was "Apex trigger GroupCreation caused an unexpected exception, contact your administrator: GroupCreation: execution of AfterDelete caused by: System.DmlException: Delete failed. First exception on row 0 with id 00Gg0000000RxOYEA0; first error: MIXED_DML_OPERATION, DML operation on setup object is not permitted after you have updated a non-setup object (or vice versa): Group, original object: IA_Team__c: []: Trigger.GroupCreation: line 83, column 1". 

Trigger GroupCreation on IA_Team__c (after insert,after update,after delete)
{
    Group grp = new Group();
    list<Group> gplist=new list<Group>();
    list<IA_Team__c> ialist=new list<IA_Team__c>();
    if(trigger.isinsert)
    {
        set<id> memids = new set<id>();
        for(IA_Team__c ev:Trigger.New)
        memids.add(ev.id);
        for(IA_Team__c ia:[select Name,Public_Group_Name__c from IA_Team__c where id in:memids])
        {
            grp.Name = ia.Name;
            System.debug('@@@@@@@@@@@@@'+ grp.id);
            grp.DeveloperName = ia.Public_Group_Name__c;
            ia.Team_Linked_To_Group__c=True;
            ia.Unique_Group_Id__c=grp.Id;
            ialist.add(ia);
            gplist.add(grp);
        }
        if(!gplist.isempty())
        {
            insert gplist;
            update  ialist;
        }
    }
  
   if(trigger.isdelete)
	 {
        set<string> memname = new set<string>();
        Map<string,string> mgroups2 = New Map<string,string>();
        for(IA_Team__c ev:Trigger.Old)
        {
            memname.add(ev.Name);
            mgroups2.put(ev.Name,ev.Name);
        }
        list<Group> resultlist=new list<Group >([select Name,DeveloperName from Group where Name in:memname]);
         list<Group> uplist=new list<Group>();
        for (Integer i = 0; i < Trigger.oldMap.size(); i++)
        {
            if(mgroups2.containsKey(Trigger.old[i].Name))
            {
               mgroups2.put(Trigger.old[i].Name,Trigger.oldMap[i].Name);
            }
        }
        for (Integer i = 0; i < resultlist.size(); i++)
        {
            if(mgroups2.containsKey(resultlist[i].Name))
            {
                resultlist[i].Name=mgroups2.get(resultlist[i].Name);
                resultlist[i].DeveloperName=mgroups2.get(resultlist[i].Name);
                uplist.add(resultlist[i]);
            }
        }
       delete uplist;
	 }
    }

 Thanks in Advance.