Pls anyone help on this

//Storing all the State with Assessd picklist value in Set type
Set<id> PartSet = new Set<id>();
For(State__c st : [Select id,states,Participantt_c from State__c where Participantt_c != null]){
	if(st.states == 'assesesd')
		PartSet.add(st.Participantt_c);
}
//Checking participant have State as Assessed picklist value or not
List<State__c> insertList = new List<State__c>();
For(Participantt_c pt : [Select id from Participantt_c]){
	if(!PartSet.contains(pt.id))
		State__c stObj = new State__c();
		stObj.Participantt_c = pt.id;
        stObj.states = 'assesesd';
		insertList.add(stObj);
}
//Insert state records
if(insertList.size() > 0)
	insert insertList;