java.lang.RuntimeException: Unable to start activity ComponentInfo{com.entitcs.office_attendance/com.entitcs.office_attendance.activities.CheckPermission}: android.database.sqlite.SQLiteException: index sub_ordinates_class_idx already exists (code 1 SQLITE_ERROR): , while compiling: CREATE INDEX sub_ordinates_class_idx ON sub_ordinates (class)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3748)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3896)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2399)
	at android.os.Handler.dispatchMessage(Handler.java:111)
	at android.os.Looper.loopOnce(Looper.java:238)
	at android.os.Looper.loop(Looper.java:357)
	at android.app.ActivityThread.main(ActivityThread.java:8094)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:957)
Caused by: android.database.sqlite.SQLiteException: index sub_ordinates_class_idx already exists (code 1 SQLITE_ERROR): , while compiling: CREATE INDEX sub_ordinates_class_idx ON sub_ordinates (class)
	at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
	at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1068)
	at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:673)
	at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:590)
	at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:62)
	at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:34)
	at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:2086)
	at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:2008)
	at com.entitcs.office_attendance.local_database.DatabaseHandler.createAllRespectiveTables(DatabaseHandler.java:931)
	at com.entitcs.office_attendance.activities.CheckPermission.onCreate(CheckPermission.java:33)
	at android.app.Activity.performCreate(Activity.java:8479)
	at android.app.Activity.performCreate(Activity.java:8458)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1386)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3729)
	... 12 more