Title: Add action for external data source field to unset value in core workflow
- What is your original issue/pain point you want to solve?
Unsetting the field after the customer changes in ticket create screen.
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Which are one or two concrete situations where this problem hurts the most?
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Why is it not solvable with the Zammad standard?
Missing core workflow action
- What is your expectation/what do you want to achieve?
Core workflow action
(Ticket#10210406)