Error linking the Task/Story to an Existing Epic in CSV Import In Company Managed Software project

[ashok.kr.jha]

I'm Importing Issue in Company Managed Software project on Jira Server version (v8.13.10): While importing issues from CSV using "External System Import" getting Null pointer for Epic Link field.

For Every Task/Bug/Story in CSV For Epic Link field we have given Issue Key (e.g. DUF -50123)

CSV contains issue in below order:

1. Epics,
2. Story,
3. Bug   

Epic link available for Story or Bug only.

Error Message:

Cannot add value [ [DUF-50123] ] to CustomField Epic Link in Issue with summary 'Sample Issue Summary'. Exception Message: null
java.lang.NullPointerException
 at com.atlassian.jira.issue.search.parameters.lucene.DefaultPermissionQueryFactory.collectProjectTerms(DefaultPermissionQueryFactory.java:141)
 at com.atlassian.jira.issue.search.parameters.lucene.DefaultPermissionQueryFactory.createQuery(DefaultPermissionQueryFactory.java:79)
 at com.atlassian.jira.issue.search.parameters.lucene.DefaultPermissionQueryFactory.getQuery(DefaultPermissionQueryFactory.java:62)
 at com.atlassian.jira.issue.search.parameters.lucene.PermissionsFilterGeneratorImpl.getQuery(PermissionsFilterGeneratorImpl.java:37)

 Note: For cloud version above configuration for migration is working. 

[Trudy Claspill]

Does the Epic with key DUF-50123 already exist in the destination Jira instance before the CSV is imported?