peamak
Moderator
Yes, you probably updated to SVN at some point and so the file has been added but the plugins don't just need the file to be there, they need to be installed as well.
2 possibilities:
1/ You think the actual fabrik.php is the most recent
So, just rename the incriminated file (fabrik.php) to fabrik_whatever.php, install the plugin and then delete fabrik.php and rename fabrik_whatever.php to fabrik.php.
Now Joomla knows the plugin is there and the file is the most recent one
2/ You don't really know
Just delete fabrik.php and install the plugin.
To feel safe you can always update to the latest SVN then.
2 possibilities:
1/ You think the actual fabrik.php is the most recent
So, just rename the incriminated file (fabrik.php) to fabrik_whatever.php, install the plugin and then delete fabrik.php and rename fabrik_whatever.php to fabrik.php.
Now Joomla knows the plugin is there and the file is the most recent one
2/ You don't really know
Just delete fabrik.php and install the plugin.
To feel safe you can always update to the latest SVN then.