SQLite Insert error (table inspection has no column named )

my inspection has column for comment values.but when i insert value for comment it gave logcat error for `E/SQLiteLog: (1) table inspection has no column named comment.can any one show me the error.thanks

E/SQLiteLog: (1) table inspection has no column named comment
01-25 23:20:00.999 3627-3627/? E/SQLiteDatabase: Error inserting comment=asdsd rating=4 inspection_id=0 sub_activity_id=0 activity_id=0
                                                 android.database.sqlite.SQLiteException: table inspection has no column named comment (code 1): , while compiling: INSERT INTO inspection(comment,rating,inspection_id,sub_activity_id,activity_id) VALUES (?,?,?,?,?)
                                                     at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
                                                     at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
                                                     at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
                                                     at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
                                                     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
                                                     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
                                                     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469)
                                                     at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1341)
                                                     at com.theavo.ck_app.DatabaseHelper.addInspection(DatabaseHelper.java:77)
                                                     at com.theavo.ck_app.FragmentComment.onClick(FragmentInspectionComment.java:312)
                                                     at android.view.View.performClick(View.java:4780)
                                                     at android.view.View$PerformClick.run(View.java:19866)
                                                     at android.os.Handler.handleCallback(Handler.java:739)
                                                     at android.os.Handler.dispatchMessage(Handler.java:95)
                                                     at android.os.Looper.loop(Looper.java:135)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5254)
                                                     at java.lang.reflect.Method.invoke(Native Method)
                                                     at java.lang.reflect.Method.invoke(Method.java:372)
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Db Helper Class

public class DatabaseHelper extends SQLiteOpenHelper {

    //static variables
    //version
    private static final int DATABASE_VERSION = 1;
    //name
    private static final String DATABASE_NAME = "db1";
    //table names
    private static final String TABLE_INSPECTION = "inspection";
    //inspection table columns name
    private static final String KEY_ID = "id";
    private static final String KEY_INSPECTION_ID = "inspection_id";
    private static final String KEY_ACTIVITY_ID = "activity_id";
    private static final String KEY_SUB_ACTIVITY_ID = "sub_activity_id";
    private static final String KEY_RATING = "rating";
    private static final String KEY_COMMENT = "comment";
    //attachment

    private static final String KEY_IMAGE = "image";

    public DatabaseHelper(Context context){
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }



    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_INSPECTION_TABLE = "CREATE TABLE " + TABLE_INSPECTION + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"+
                KEY_INSPECTION_ID + "INTEGER,"+ KEY_ACTIVITY_ID+ "INTEGER,"+KEY_SUB_ACTIVITY_ID+"INTEGER,"+KEY_RATING+"INTEGER,"+
                KEY_COMMENT+" TEXT"+ ")";

        String CREATE_ATTACHMENT_TABLE = "CREATE TABLE " + TABLE_ATTACHMENT + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"+
                KEY_INSPECTION_ID + "INTEGER,"+ KEY_IMAGE+ " BLOB"+")";

        db.execSQL(CREATE_ATTACHMENT_TABLE);
        db.execSQL(CREATE_INSPECTION_TABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS "+TABLE_ATTACHMENT);
        db.execSQL("DROP TABLE IF EXISTS "+TABLE_INSPECTION);

        onCreate(db);

    }

    //CURD

    //add inspection
    void addInspection(DBModelInspection inspection){
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues contentValues = new ContentValues();
        contentValues.put(KEY_INSPECTION_ID, inspection.getInspectionId());
        contentValues.put(KEY_ACTIVITY_ID, inspection.getActivityId());
        contentValues.put(KEY_SUB_ACTIVITY_ID, inspection.getSubActivityId());
        contentValues.put(KEY_RATING, inspection.getRating());
        contentValues.put(KEY_COMMENT, inspection.getComment());

        db.insert(TABLE_INSPECTION, null, contentValues);
        db.close();
    }

    //Add attachment
    void addAttachment(DBModelAttachment attachment){
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues contentValues = new ContentValues();
        contentValues.put(KEY_INSPECTION_ID, attachment.getInspectionId());
        contentValues.put(KEY_IMAGE, attachment.getImage());

        db.insert(TABLE_ATTACHMENT, null, contentValues);
        db.close();
    }

    public List<DBModelInspection> getAllInspection(){
        List<DBModelInspection> inspectionList = new ArrayList<DBModelInspection>();
        String selectQuery = "SELECT  * FROM " + TABLE_INSPECTION;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                DBModelInspection inspection = new DBModelInspection();
                inspection.setInspectionId(Integer.parseInt(cursor.getString(0)));
                inspection.setActivityId(Integer.parseInt(cursor.getString(1)));
                inspection.setSubActivityId(Integer.parseInt(cursor.getString(2)));
                inspection.setRating(Integer.parseInt(cursor.getString(3)));
                inspection.setComment(cursor.getString(4));
                // Adding inspection to list
                inspectionList.add(inspection);
            } while (cursor.moveToNext());
        }

        // return inspection list
        return inspectionList;
    }

    public List<DBModelAttachment> getAllAttachment(){
        List<DBModelAttachment> attachmentList = new ArrayList<DBModelAttachment>();
        String selectQuery = "SELECT  * FROM " + TABLE_ATTACHMENT;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                DBModelAttachment attachment = new DBModelAttachment();
                attachment.setInspectionId(Integer.parseInt(cursor.getString(0)));
                attachment.setImage(cursor.getBlob(1));
                // Adding attachment to list
                attachmentList.add(attachment);
            } while (cursor.moveToNext());
        }

        // return contact list
        return attachmentList;
    }
}