Hi Team,
Requirement : cloning from custom detail page.
I got an issue, after clicking on clone button the record was saved to database.
I want to save the record after clicking on save button only, other wise the record dont want to save in database like standard functionality.
my code :

<apex:page standardController="High_Risk_Success_Factors__c" sidebar="true" extensions="HighRiskSuccessFactorsDetailCls" tabStyle="Account" >
    <apex:form >
       
        <apex:pageBlock title="High Risk Success Factors Details">
            
            <apex:pageBlockButtons >
                
                
                <apex:commandButton value="Clone" action="{!doClone}" id="cloneButton"/>
                <apex:commandButton value="Save" action="{!Save}" id="saveButton" style="display:none;" />
                <apex:commandButton value="Edit" action="{!Edit}" id="editButton" />
                <apex:commandButton value="Delete" action="{!Delete}" onclick="if(!confirm('Are you sure?')){return false};" id="deleteButton" />
               <apex:commandButton value="Cancel" action="{!doCancel}" id="cancelButton" immediate="true" style="display:none;" />
            </apex:pageBlockButtons>
            <apex:inlineEditSupport event="ondblClick" showOnEdit="saveButton,cancelButton" hideOnEdit="editButton,deleteButton,cloneButton" />
                <apex:pageBlockSection title="Account/Opportunity Details" columns="2">
                <apex:outputField value="{!High_Risk_Success_Factors__c.Name}" />	
                <apex:outputField value="{!High_Risk_Success_Factors__c.Account_Name__c}" />
                <apex:outputField value="{!High_Risk_Success_Factors__c.Opportunity_Name__c}" />
                <apex:outputField value="{!High_Risk_Success_Factors__c.Opportunity_Stage__c}" />
                <apex:outputField value="{!High_Risk_Success_Factors__c.Primary_Division__c}" />
                <apex:pageBlockSectionItem >
                    <apex:outputText >Global Unique ID</apex:outputText>
                <apex:outputField value="{!High_Risk_Success_Factors__c.Global_Unique_ID__c}" />  
                    </apex:pageBlockSectionItem>                 
                
            </apex:pageBlockSection>
 </apex:pageBlock>
       
    </apex:form>
    
</apex:page>

apex class :

public with sharing class HighRiskSuccessFactorsDetailCls {
    
    
    private ApexPages.StandardController con {get;set;}
    
    public HighRiskSuccessFactorsDetailCls(ApexPages.StandardController sc){
        this.con=sc;
       
    }
   
    public PageReference save(){
        try{
            con.save();
            PageReference pr = Page.HighRiskSuccessFactorsDetailPage;
            pr.setRedirect(true);
            pr.getParameters().put('id',con.getId());
            return pr;
        }catch(Exception e){
            ApexPages.addmessage(new ApexPages.message(ApexPages.severity.ERROR, e.getMessage()));
            return null;
        }
    }
    
   public PageReference doClone(){
        try{
            //con.save();
            PageReference pr = Page.HighRiskSuccessFactorsVFPage;
            pr.setRedirect(true);
            High_Risk_Success_Factors__c hr = [SELECTid,name,Account_Name__c,Opportunity_Name__c,Opportunity_Stage__c FROM High_Risk_Success_Factors__c where id =:con.getId()];
            High_Risk_Success_Factors__c clonedhr = hr.clone(false,false,false,false);
            insert clonedhr;
            pr.getParameters().put('id',clonedhr.Id);
            return pr;
        }catch(Exception e){
            ApexPages.addmessage(new ApexPages.message(ApexPages.severity.ERROR, e.getMessage()));
            return null;
        }
    } 
    
    
        Public PageReference doCancel(){
            
            PageReference pr = new PageReference('/'+Schema.SObjectType.High_Risk_Success_Factors__c.getKeyPrefix()+'/o');
            return pr;

        }

}

Please let me know anyone, how can we resolve this issue?

Thanks
Lakshmi