It has been discovered that the update to Joomla 3.9.16 fails if your Joomla site has duplicate usernames. This is a very rare situation which may exist due as a result of migrating users from one Joomla site to another directly in a database. In this video we'll see how to search for duplicate usernames in Joomla and how to correct them if you find any. One of the methods we try is an SQL query suggested by Joomla, but so far I have been unable to get that to work. Here are some links mentioned in this stream:
- Video demonstrates how to find and correct duplicate usernames in Joomla.
- Issue with duplicate usernames causing problems in Joomla 3.9.16 update.
- Duplicate usernames can arise from importing content or migrating sites.
- Tutorial focuses on small sites or manual username adjustments.
- Users can change usernames individually or sort/filter in backend.
- SQL query provided to identify duplicate usernames in database.
- Transcription includes troubleshooting attempt using SQL query.
- Mention of a potential plugin by Joomla Gig for detecting duplicates.
- Search for plugin not successful, potential solution found in an extension shared by John Molehole.
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