Estou tentando fazer um insert com 4 colunas no laravel, porém esta dando erro: “ErrorException: Invalid argument supplied for foreach() in”

1. Controller

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   <code>private function insertRelationship($protocolo2, $relationship){

   foreach ($relationship as $key => $value) {

   $keyClass = str_replace(' ', '', ucwords(str_replace('', ' ', $key)));

   $value = array_filter($value);

   $value = array_push($value, $protocolo2->guia);

   $class = 'AppRProtocolo2' . $keyClass;

   (new $class())->where('protocolo2_id', $protocolo2->id)->delete();

   foreach ($value as $st) {

   $instance = new $class();

   $instance->protocolo2_id = $protocolo2->id;

   $instance->$key = $st;

   $instance->save();

   }

   }

   }

   </code>

   <code>private function insertRelationship($protocolo2, $relationship){ foreach ($relationship as $key => $value) { $keyClass = str_replace(' ', '', ucwords(str_replace('', ' ', $key))); $value = array_filter($value); $value = array_push($value, $protocolo2->guia); $class = 'AppRProtocolo2' . $keyClass; (new $class())->where('protocolo2_id', $protocolo2->id)->delete(); foreach ($value as $st) { $instance = new $class(); $instance->protocolo2_id = $protocolo2->id; $instance->$key = $st; $instance->save(); } } } </code>

   private function insertRelationship($protocolo2, $relationship){
   
   foreach ($relationship as $key => $value) {
   
   $keyClass = str_replace(' ', '', ucwords(str_replace('', ' ', $key)));
   $value = array_filter($value);
   $value = array_push($value, $protocolo2->guia);
   $class = 'AppRProtocolo2' . $keyClass;
   (new $class())->where('protocolo2_id', $protocolo2->id)->delete();
   
            foreach ($value as $st) {
                $instance = new $class();
                $instance->protocolo2_id = $protocolo2->id;
                $instance->$key = $st;
                $instance->save();
   
            }
        }
   
   }
   
   

Gostaria que todas as informações fossem incluídas na mesma linha. Ele não reconhece a 3 coluna “guias” preenche apenas o ID primary key, protocolo2_id Foreign key e o campo protocolo. Porém o sistema não aceita a 4 coluna que é “guias”.