I have a VF page which contains 2 page blocks. One page block will insert the record in custom object. The 2nd page block conatins 2 fields (date and dropdown) after selecting the fields and click of button the records should show in page block.

All the fileds on the 1st page block are mandatory. The 1st page block works fine with no issues
.
But when I click 'Go' button on 2nd page block an error shows up on the field of 1st page block.

I have used <actionRegion> as well in 2nd page block but still not working. Please help

Screesnhots are below:

Visualforce page

<apex:page Controller="AllTicketReporting"   showHeader="false" tabStyle="Ticket_Effort_Category__c" docType="html-5.0">
    <script>
  		document.title = "XYZ Reporting";
	</script>
    <script>
	function DynamicDatePicker(d_id)
	{
    DatePicker.pickDate(false,d_id.id,false);
	}
	</script>
	   
    <style type="text/css">
     .activeTab {background-color: #236FBf;  color:white; background-image:none}
     .inactiveTab { background-color: white; color:black; background-image:none}
    	body{background-color: #F8F8FF;}
       .bPageBlock {background-color: #778899 ;}
        .bAlign {text-align:center;}
    </style>
    
    <apex:panelGrid columns="2" width="100%">
        <apex:panelGrid columns="1" width="100%">
			<img src="{!$Resource.logo1}" width="100px" height="100px" align="left"/>
        </apex:panelGrid>

        <apex:outputlabel style="font-style:regular; font-weight:bold; font-size:30px; font-family:Helvetica; color:DodgerBlue;" 
                          value="XYZ Reporting" />

    </apex:panelGrid>
    <apex:form styleClass="myFormStyle" >
	
    <!-- Incident reporting -->
        <apex:pageBlock title="Incident / Problem Reporting" tabStyle="Ticket_Effort_Category__c" >
        <apex:pageBlockTable value="{!tktRecord}"  title="Incident Reporting" var="Incident" id="msgsI" >
            
        	<apex:column headerValue="Date">
                	
                    <apex:inputField value="{!Incident.Date__c}" required="true"/>
            </apex:column>
            
            <apex:column headerValue="Divsion">
                    <apex:inputField value="{!Incident.Division__c}" required="true"/>
            </apex:column>
            <apex:column headerValue="Application">
                    <apex:inputField value="{!Incident.Application__c}" required="true"/>
            </apex:column>
           	<apex:column headerValue="Ticket Number">
            		<apex:inputField value="{!Incident.Ticket_Number__c}" required="true"/>
            </apex:column>
    		<apex:column headerValue="Technology">   
	        		<apex:inputField value="{!Incident.Technology__c}" required="true"/>
            </apex:column>
        	<apex:column headerValue="Responsible">
    				<apex:inputField value="{!Incident.Responsible__c}" required="true" />
        	</apex:column>
         	<apex:column headerValue="Phase">
            		<apex:inputField value="{!Incident.Phase__c}" required="true"/>
         	</apex:column>
         	<apex:column headerValue="Effort">
            		<apex:inputField value="{!Incident.Effort__c}" required="true"/>
          	</apex:column>
       	</apex:pageBlockTable>
        
        <apex:pageBlockButtons location="bottom" style="float:centre">
        	<apex:commandButton value="Save" 	action="{!saveTicketData}" reRender="msgsI" style="margin-right:20px;"/>
            <!--apex:commandButton value="Save">
                 <apex:actionSupport action="{!saveTicketData}" event="onchange" rerender="msgsI" />
            </apex:commandButton-->    
            <apex:commandButton value="Cancel" 	action="{!cancelTicketData}" reRender="msgsI" style="margin-right:30px;" />
            <!--apex:commandButton value="Cancel">
                 <apex:actionSupport action="{!cancelTicketData}" event="onchange" rerender="msgsI" />
            </apex:commandButton-->    
            <apex:outputLink value="https://curious-impala-lyabo0-dev-ed--c.visualforce.com/apex/ExcepReportDownload?core.apexpages.request.devconsole=1" id="theLink" style="margin-right:600px;">Export</apex:outputLink>
        </apex:pageBlockButtons>
    </apex:pageBlock>
  
 	
    <apex:actionRegion >    
    <!--Summary section -->    
	<apex:pageBlock title="Summary"   id="msgsS" tabStyle="Ticket_Effort_Category__c" >
        <apex:pageBlockSection >
        <apex:OutputPanel >
         <apex:panelGrid columns="5">
             <apex:outputLabel style="font-style:regular; font-weight:bold; font-size:11px; font-family:Helvetica;">
                                      Date </apex:outputLabel>
             <apex:inputText id="time" value="{!SelectedDate}" onfocus="DynamicDatePicker(this);" onchange="checkDateFormatt(this.id);" size="10" disabled="false" style="width:90px; margin-right:10px;"/>
             <apex:outputLabel style="font-style:regular; font-weight:bold; font-size:11px; font-family:Helvetica;">
                                      Select Assigned Person </apex:outputLabel>
             <apex:selectList value="{!selecteduserId}" size="1" multiselect="false" style="margin-right:10px;" >
                <apex:selectOptions value="{!ListOfUser}" />
             </apex:selectList>
          <!--apex:commandButton value="Go" action="{!showPB}" reRender="msgsS"  /-->
              <apex:commandButton value="Go">
                 <apex:actionSupport action="{!showPB}" event="onchange" rerender="msgsS" />	
             </apex:commandButton>
        </apex:panelGrid>           
        </apex:OutputPanel>
        </apex:pageBlockSection>

<!--Summary-->
        <apex:pageBlockTable value="{!fetchlist}" var="I"  >
            <apex:column headervalue="Date" value="{!I.Date__c}"/>
            <apex:column headervalue="Date" value="{!I.Ticket_Number__c}"/>
             <apex:column headervalue="Division" value="{!I.Division__c}"/>
             <apex:column headervalue="Application" value="{!I.Application__c}"/>
             <apex:column headervalue="Responsible" value="{!I.Responsible__c}"/>
             <apex:column headervalue="Effort" value="{!I.Effort__c}"/>
        </apex:pageBlockTable>
       </apex:pageBlock>   
        
        </apex:actionRegion>
    </apex:form>
</apex:page>


Apex controller:

public class AllTicketReporting {

  	public Ticket_Effort_Category__c tktRecord{set;get;}
    public list<Ticket_Effort_Category__c> fetchList{get;set;}
	public list<Ticket_Effort_Category__c> userList{get;set;}
    public String selecteduserId {set;get;}
    public Date selectedDate {set;get;}
    public boolean PBFlag{set;get;}

    public AllTicketReporting() {
  	     	tktRecord = new Ticket_Effort_Category__c(); 
   			 selecteduserId ='';
            
 	}
    
    public Pagereference saveTicketData(){
            
          	List<Ticket_Effort_Category__c> ticketExist = new List<Ticket_Effort_Category__c> ();
            ticketExist = [select id from Ticket_Effort_Category__c 
            		       where Ticket_Number__C = :tktRecord.Ticket_Number__C ] ;
        	 	
        
        try{
//            if(!ticketExist.isEmpty()){
//              tktRecord.id =  ticketExist[0].id;
//             upsert tktRecord;
//
//            }else{ 
               insert tktRecord;

//            }
              PageReference pr = new PageReference('/apex/TicketReporting?core.apexpages.request.devconsole=1');
              pr.setRedirect(true);
          
              return pr;
            
       }
        catch(Exception e){
            String error = e.getMessage();
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,error));
            return null;
            
        }
    }
    public Pagereference cancelTicketData() {
        tktRecord = new Ticket_Effort_Category__c();
        return null;
    }
    
    public list<Ticket_Effort_Category__c> summarylist(){
		
        fetchList = new list<Ticket_Effort_Category__c>(); 
        if(string.isNotEmpty(selecteduserId) || (system.today()  < selectedDate)){
        
        	fetchList = [select Date__c, ticket_number__c, Division__c, Application__c, Responsible__c, Effort__c 
                     from Ticket_Effort_Category__c 
                     where Responsible__c = :selecteduserId and
                     	   Date__c = :selectedDate];
            PBFlag = false;
            return fetchlist;
        }else {
            ApexPages.addmessage(new ApexPages.message(ApexPages.severity.WARNING,'Please enter Account phone'));
            return null;
        }    
        
            
	}
    public void showPB(){
    	PBFlag=true;    
    }
        
    
    
    public List<SelectOption> getListOfUser(){
 		 
         List<SelectOption> selectOptions = new List<SelectOption>();
         selectOptions.add(new SelectOption( ' ' ,'---Select---'));
     	 Schema.DescribeFieldResult describeResult = Ticket_Effort_Category__c.Responsible__c.getDescribe();
      	List<Schema.PicklistEntry> pickListEntries = describeResult.getPicklistValues();
            
      	for( Schema.PicklistEntry eachEntry : pickListEntries) {
         selectOptions.add(new SelectOption(eachEntry.getLabel(), eachEntry.getValue()));    
      	}
        return selectOptions;
        
	}

}