Numeric field change

[arno]

Hi All

We recently added a numeric field that records the number of times the state has changed (for example, reject), and we want to count the number of times we reject when the issue ends. I used scriptrunner to write the following script, prompting an error, how should I optimize this code

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import com.atlassian.jira.component.ComponentAccessor

def customFieldManager = ComponentAccessor.customFieldManager

def id = customFieldManager.getCustomFieldObject('customfield_13834')

def value = issue.getCustomFieldValue(id)

value ++

issue.setCustomFieldValue('customfield_13834',value)

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