Laravel - Save returns true but not updating the database

try{
    $abcd = $cat->save();
    var_dump($abcd);exit; // returns true
} catch (Exception $e){
    echo '<pre>';print_r($e);exit;
}

Dumping the data just before save function is printing all correct.

Tried this code - it dumps as true but not getting updated in database. I have tried all known scenarios. Any exceptional cases that this can happen.?

primary key, id , .... and some other checks are already done. But no progress.

via Chebli Mohamed