Google Maps MapsFragment causing the app to crash

I'm new to Android programming, but what I'm trying to do seems pretty straightforward. I have this setting with 4 different tabs in the action bar, the first should display the Google Maps API Snippet, and the others should show some other things that I haven't done yet. After several online tutorials, I managed to get the functionality that I need for the tabs and get a map.

The application works great when switching from the initial tab using the map (tab 1) to another, but when you try to return to it, it crashes. Oddly enough, when a fragment of the map is on one of the tabs, it also causes the second tab to crash on some transitions, the image below shows the transitions shown as blue arrows work fine, and those with yellow arrows cause the application to crash .

http://imageshack.com/a/img839/4796/kf7w.png

If I changed the first fragment of the tab for one of the others, all the transitions are beautiful again, so I think the problem should really be with the map fragment.

My code is as follows:

MainActivity.java

public class MainActivity extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
private String[] tabs = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    viewPager = (ViewPager) findViewById(R.id.pager);
    actionBar = getActionBar();
    mAdapter = new TabsPagerAdapter(getSupportFragmentManager());

    viewPager.setAdapter(mAdapter);
    actionBar.setHomeButtonEnabled(false);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    tabs = getResources().getStringArray(R.array.tab_names);
    for (String tab_name : tabs)
        actionBar.addTab(actionBar.newTab().setText(tab_name).setTabListener(this));

    /**
     * on swiping the viewpager make respective tab selected
     * */
    viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            // on changing the page
            // make respected tab selected
            actionBar.setSelectedNavigationItem(position);
        }

        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
        }

        @Override
        public void onPageScrollStateChanged(int arg0) {
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
    // TODO Auto-generated method stub

}

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    viewPager.setCurrentItem(tab.getPosition());        
}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
    // TODO Auto-generated method stub

}

}

TabsPagerAdapter.java

public class TabsPagerAdapter extends FragmentPagerAdapter {

public TabsPagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int index) {
    switch (index){
    case 0:
        return new GoogleMapsFragment();
    case 1:
        return new SampleFragment();
    case 2:
        return new ContactFragment();
    case 3:
        return new WhoFragment();
    default:
        Log.e("switch", "default");
    }
    return null;
}

@Override
public int getCount() {
     // get item count - equal to number of tabs
    return 4;
}

}

GoogleMapsFragment.java

public class GoogleMapsFragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.activity_map, container, false);

    return rootView;
}

@Override
public void onDestroyView() {
    super.onDestroyView();
    Fragment f = (Fragment) getFragmentManager().findFragmentById(R.id.map);        
    if (f != null) {
        getFragmentManager().beginTransaction().remove(f).commit();
    }
}
}

And the xml files:

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"

android:background="#ffff0000"
android:id="@+id/mainLayout"
android:tag="@+id/mainLayoutTag" >

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:tag="pagerTag">
</android.support.v4.view.ViewPager>

</RelativeLayout>

activity_map.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/mapLayout"
android:tag="mapLayoutTag" >

<fragment android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:name="com.google.android.gms.maps.MapFragment"
      android:tag="gMaps"/>


</RelativeLayout>

Java , xml RelativeLayout .

, , ? , :)

EDIT: :

02-10 23:42:01.723: E/AndroidRuntime(7221): Caused by: 
java.lang.IllegalArgumentException: Binary XML file line #9: 
Duplicate id 0x7f05000a, tag gMaps, or parent id 0x7f050009 with another 
fragment for com.google.android.gms.maps.MapFragment