why after export a workflow with approval steps, new workflows doesnt have this option anymore

[j]

This question is in reference to Atlassian Documentation: Configuring JIRA Service Desk approvals

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[j]

sorry the option "add approval" is enabled only if the workflow is assign to a service desk project.

[j]

the option "add the approval" doesnt appear for:
- new workflows - inactive
- new workflows - active (that are asigned to a service desk project)

the option is active in workflows that were create before

[Steven F Behnke]

Does it add the 'approval' option when you assign the workflow back to a service desk project?

[j]

when i try to export a workflow (like workflow or xml) the option "add approval" dissapear. (with  new workflows)

and if i try to import the workflow in other JIRA instance the option "add approval"  dissapear too

i tried

• deleting .bundle, ocgi folders and restarting .... 
• support tools
• integrity checker 

but all these activities doesnt fix the problem...