If you have an existing WordPress installed website, but suddenly it’s asking for installation again, then there can be two major reasons:
- wp-config.php file mismatch issue
- Database tables mismatch issue
We need to make sure that, the wp-config.php file database’s table prefix and phpMyAdmin table prefix is matching or not.
1. So, go to your WordPress install directory and open the wp-config.php file.
2. Then open your phpMyAdmin, and verify if the database table prefix same or not.
In our case, it’s matching, but in your case, this prefix can be different. Then, you need to edit the correct table prefix in your wp-config.php file.
If you have multiple WordPress installed on the same database then there might be multiple databases prefix, then you need to identify which database prefix belongs to your error-making website.
In some cases, the table prefix mentioned in wp-config.php is in capital letter, but the phpMyAdmin database prefix is in small letter, so you need to edit the correct small letter prefix in your wp-config.php file.
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