Is it possible to rename a completed sprint?

[Xiang Zhang]

This question is in reference to Atlassian Documentation: Ending a Sprint

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[Peter Geshev]

Hi,

If you use JIRA Server one approach is to rename the name in the DB directly using a pluginsuch as Home Directory and DB Browser for JIRA. 

For cloud you may try the advices given in this support issue

Regards,

Peter