java.lang.NullPointerException: null com.adobe.granite.workflow.core.job.JobHandler.process after renaming asset from workflow

[DillipDi]

we have workflow which triggers to rename an asset but my workflow is getting triggered multiple times with following exception

com.adobe.granite.workflow.core.job.JobHandler Error executing workflow step
java.lang.NullPointerException: null
at com.adobe.granite.workflow.core.job.JobHandler.process