CareerBuilder Demo Company >> Sever Error on Job Application Questionnaire

While candidate applying from carrier integration URL, server error occurred on Job Application Questionnaire popup.

Exception : The INSERT statement conflicted with the FOREIGN KEY constraint "FK_CandidateJobApplications_Candidate". The conflict occurred in database "UXCompany_12742", table "rct.Candidate", column `ID`.Cannot insert the value NULL into column `CandidateJobApplicationsID`, table `UXCompany_12742.rct.WorkFlowSummary`; column does not allow nulls. INSERT fails.The statement has been terminated.The statement has been terminated.
App Error Log : ControllerAppTier.Save->RecruitControllerAppTier.Save->Candidate.SaveQuestionniareAnwers
Employee ID : 0
Action Name : SaveQuestionniareAnwers
Model : System.Web.Mvc.HandleErrorInfo
Controller : PlatformSharedBase
Web Error Log : at WORKTERRA.Recruit.RecruitControllerWebTier.Save(ObjectType I_objectType, Hashtable I_criteria, Object I_context)
at WORKTERRA.Models.RecruitApplyJobModel.ApplyJob(String JobId, String CandidateID)
at WORKTERRA.Shared.Controllers.PlatformSharedBaseController.SaveQuestionniareAnwers(String JobId, String CandidateID)
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.<>c_DisplayClass13.b_10()
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)