Method server throws error "wt.workflow.work - Exception In method StandardWorkflowService.performCheckWTKeySeqNumberConsistency" while starting Windchill PDMLink

• After Database restoration, Windchill is not starting and throws error as below in Method Server logs -

ERROR [main] wt.workflow.work  - Exception In method StandardWorkflowService.performCheckWTKeySeqNumberConsistency 
ERROR [main] wt.method.server.startup.services  - Failure to start manager wt.workflow.work.StandardWorkflowService
wt.services.ManagerException: wt.util.WTException: java.lang.NumberFormatException: null
Nested exception is: java.lang.NumberFormatException: null
Nested exception is: wt.util.WTException: java.lang.NumberFormatException: null
Nested exception is: java.lang.NumberFormatException: null
               at java.lang.Long.parseLong(Long.java:552)
               at java.lang.Long.parseLong(Long.java:631)
               at wt.workflow.work.StandardWorkflowService.performCheckWTKeySeqNumberConsistency(StandardWorkflowService.java:5472)
               at wt.workflow.work.StandardWorkflowService.performStartupProcess(StandardWorkflowService.java:5336)
               at wt.services.StandardManager.startup(StandardManager.java:459)
               at wt.services.ManagerImplementation.startup(ManagerImplementation.java:363)
               at wt.services.DefaultStartupHandler.startup(DefaultStartupHandler.java:112)
               at wt.services.StandardManagerService.performStartupProcess(StandardManagerService.java:166)
               at wt.services.StandardManager.startup(StandardManager.java:459)
               at wt.services.StandardServicesHandler.start(StandardServicesHandler.java:44)
               at wt.method.MethodServerMain.run(MethodServerMain.java:603)
               at wt.method.MethodServerMain.main(MethodServerMain.java:373)