XF 2.0 A Database MySQL error

I have this error when I try to install XenForo 2 in Ubuntu 16.04
XF\Db\DuplicateKeyException: MySQL query error [1062]: Duplicate entry 'XF' for key 'PRIMARY' in src/XF/Db/AbstractStatement.php at line 212


Well-known member
We'd need the full backtrace and request details for the error, as listed in the server error log.
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