Not able to Map Existing Images with another content type

I am facing a situation here.

I have a content type A with an image field(field_upload_snaps) in it. There is another content type B which also contains an image field(field_valid_snaps).

Now user will upload the pics from A content type. So if user upload 3 pics via A then 3 FID and their corresponding URIs will be created in file_managed table in Drupal 7.

Now I have a requirement where I have to insert 2 images out of 3 programatically using Drupal code. Now there is no need to generate any new image copy in public URI as images already exist via A.

I tried two approaches:-

1) I have created a new node of Type B. I tried to fetch file URI,filesize,filemime and all relevant parameter from existing fid and associate with the node using this.

global $user;
$node = new stdClass();
$node->type = "user_slideshow_snaps";
$node->language = LANGUAGE_NONE;
node_object_prepare($node);
$node->uid = $user->uid;
$file = (object) array(
'uid' => $user->uid,
'uri' => 'public://1.jpeg" ,
'filemime' => 'image/jpeg',
'status' => 1,
);

$node->field_upload_snaps['und'][] = (array)$file;
$node = node_submit($node); // Prepare node for a submit
node_save($node);

But it gives me an error that "Cant insert duplicate value in file_managed". It will give because such value already exist in file_managed via A. So I am not able to save value.

2) I saved node first and then manually insert in the image field like this.

global $user;
$node = new stdClass();
$node->type = "user_slideshow_snaps";
$node->language = LANGUAGE_NONE;
node_object_prepare($node);
$node->uid = $user->uid;
$node = node_submit($node); // Prepare node for a submit
node_save($node);

db_insert('field_data_field_valid_snaps')
->fields(array(
'entity_type' => 'node',
'bundle' => 'user_actualD_snaps',
'deleted'=> 0,
'entity_id'=>$node->nid,
'delta'=>0,
'field_valid_snaps_fid'=>517,
'field_valid_snaps_alt'=>'',
'field_valid_snaps_title'=>'',
'field_valid_snaps_width'=>200,
'field_valid_snaps_height'=>300,
))
->execute();

But the line after node_save() doesnt execute in this case. So I am not able to save it.

Are there any functions available which will map existing images into another table?