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Verify the settings of the task mode custom field (Jira Admin permissions needed).
Go to Jira Administration > Issues
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Select Custom fields on the left.
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Find the task mode field
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Go to Actions > Configure
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Verify the following settings
Go to Edit Options
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make sure all four period modes are listed and enabled.
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Change applicable contexts for the scheme.
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Ensure the fields are available for all issue types and the context is global.
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