Change co relation number not updating

[Anandkumar g]

Hello 

I have used Rest API servicenow to servicenow Integration 

I used the below code for change Co relation updates, but it's not updating if I try to update this change type changed in Emergency change. Please help me to fix this issue

=======================================================================

(function executeRule(current, previous /*null when async*/ ) {

    var asmnt_grp = current.getDisplayValue('assignment_group');

    var queue = current.getDisplayValue('u_queue');

    var ebond;

    var flag = '';

        if (current.comments.changes() && current.work_notes.changes())

            flag = 'comments_notes';

        else if (current.work_notes.changes())

            flag = 'notes';

        else if (current.comments.changes())

            flag = 'comments';

        if (current.correlation_display.toString() == '') {

            ebond = new genericEbondingUtil().initiateEbonding(current.sys_class_name, current, 'insert', current.number.toString(), flag);

            // updates of ot corelation number

            current.correlation_display= JSON.parse(ebond).result.number;

            current.correlation_id=JSON.parse(ebond).result.sys_id;

            current.update();

        } else {

            ebond = new genericEbondingUtil().initiateEbonding(current.sys_class_name, current, 'update', current.number.toString(), flag);

        }

})(current, previous);

=============================================================

Thanks in Advance

[Anandkumar g]

I tried below code but i am getting error Invalid Insert and change changed to emergency code

(function executeRule(current, previous /*null when async*/ /*)

{

    var asmnt_grp = current.getDisplayValue('assignment_group');

    var chg_type = current.getDisplayValue('type');

    var approvs = current.getDisplayValue('approval');

    //  gs.addErrorMessage(chg_type);

    //gs.addErrorMessage(approvs);

    var queue = current.getDisplayValue('u_queue');

    var ebond;

    var flag = '';

    if (current.comments.changes() && current.work_notes.changes())

        flag = 'comments_notes';

    else if (current.work_notes.changes())

        flag = 'notes';

    else if (current.comments.changes())

        flag = 'comments';

    if (current.correlation_display.toString() != '') {

        // Ebond Update validation

        ebond = new genericEbondingUtil().initiateEbonding(current.sys_class_name, current, 'update', current.number.toString(), flag);

        gs.log("Updateebond_1" + current.number.toString());

    } else

    if (current.operation() == 'insert') {

        ebond = new genericEbondingUtil().initiateEbonding(current.sys_class_name, current, 'insert', current.number.toString(), flag);

        gs.log("Insertebond_1"+ current.number.toString());

        // updates of ot corelation number

current.correlation_display= JSON.parse(ebond).result.number;

        current.correlation_id=JSON.parse(ebond).result.sys_id;

  current.update();

    }

})(current, previous);