I have a valid license till May 2021, need to install on a server previously having older version

[Chetan Handa]

• I tried install Jira on a server which previously had an older version which had expired.
• When I install I get the below  message :
  License Too Old For Build: We found a problem with your JIRA license
• I then clicked on the link which takes me to a new page where I can enter my new license details.
• My questions are related to this page where I need to enter an admin user name, admin password and new license.
  • I have the license key (I can copy and paste the new license key, no problem)
  • I don't know which admin user name to use ? 
    • I keep getting a message that the user name is incorrect.
      I'm guessing its asking me for the admin user name of the older installation. How can I delete the older installation completely so that it stops asking me the admin user name of an installation which expired long time back.
      -- Can I start fresh ? I have a new valid license and I don't remember the very old username of the expired installation.

[Deepanshu Natani]

Hi @Chetan Handa 

Can you confirm that the data present on older Jira instance is of no use to you and you want to entirely delete its data?

[Chetan Handa]

Yes, the older data is of no use, it just had some test data. 
I'd like to start fresh.

[Daniel Ebers]

If I understood you correctly there were some issues with the license and for easier handling you decided to wipe the existing installation - because the data is not needed anymore and you want to start fresh.

If so, you would just need to delete jira (installation directory) along with jira_home (home directory). Additionally you would need to delete the database.

Then a new installation with the license key you said it would be valid until 2021 is needed.

https://confluence.atlassian.com/adminjiraserver/installing-jira-applications-938846823.html

[Chetan Handa]

Thanks that worked.
New instance is working, I just had to get rid of the older folder.