Applying New workflow version to old records/workflow

[kduong]

Is it possible to apply the latest workflow version to old records/workflow?

I know there is a way to restart the workflow. Am I correct in saying that the restart workflow will restart the current workflow associated with the record? meaning it will restart the old workflow?

[Pradeep Sharma]

Thanks Ken for the update.

Please do mark my original answer as correct once the issue is resolved, so others can find it quickly when searching for the same question

Kindly let me know if you have any questions.

[Community Alums]

Try using below script, it works for me: 

I'm using background script:

var gr = new GlideRecord('add_table_name');
gr.addEncodedQuery("add_your_query_here");
gr.query();
while (gr.next()) // use while for multiple, if for single record
{
var wkfw = new Workflow();
wkfw.deleteWorkflow(gr); // this will delete the workflow from the record 
gr.add_field_name = 'add_field_value'; // update the record to attach the new workflow, the update should be matching with the trigger condition of the updated workflow version. For eg. gr.state = 'In Progress;'
gr.update();
}

Please mark this answer as true, if it solves your problem.