Avoid overriding ALL voyager's controllers
At some point we overrode ALL voyager's controllers, by editing the configuration file
'controllers' => [ 'namespace' => 'App\\Http\\Controllers\\Voyager' /* 'namespace' => 'TCG\\Voyager\\Http\\Controllers',*/ ],
This is not recommended by the voyager's developers: possible problems with later updates.
We must see exactly what differs between these locally-placed controllers and those in /vendor/tcg/, and override only what is strictly necessary.