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Hi
The error is from Joomla If a user with is 139 has created any content like the article and you deleted this user.
You will get this error.
Either you can change the author of article to different user (you need to check what item this user created)
Or create a new account and change user ID with 139 from PHPMyadmin.
Tip:
www.gavick.com/documentation/joomla/tuto...x-juser-error-joomla