Remove data creation at each launch

app/src/main/java/net/pokeranalytics/android/ui/activity/HomeActivity.kt

@@ -66,16 +66,16 @@ class HomeActivity : PokerAnalyticsActivity() {
 	private fun createDefaultSessions() {
 
 		val realm = Realm.getDefaultInstance()
+		if (realm.where(Session::class.java).findAll().isEmpty()) {
 			realm.sessionDao().deleteAllSessions()
-
 			val data = ArrayList<Session>()
-
 			for (i in 0..100) {
 				val session = Session()
 				session.creationDate = Date()
 				data.add(session)
 			}
 			realm.sessionDao().createOrUpdateSessions(data)
+		}
 		realm.close()
 
 	}