Works fine for the first time, next time getting DB locked issue

Please find the below function.it works fine for the first time.

I mean , when i add a text it works for the first time , then when i try to add a new text again , it give me like "DB is locked".

I am not sure how it works for the first not again?

Please let me know what is the problem in my code.

//==================================================================

- ( BOOL ) addNewSimpleTemplates:(NSString*)dbPath:(NSString*)title{

//==================================================================



  BOOL returnVal = NO;



  NSString *maxValuePosition;



  if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) 

  {

    NSString *selectSQL = [NSString stringWithFormat:@"select MAX(pr.position) FROM phrase_reference pr inner join storyboard_main_categories smc on smc.id = pr.main_category_id where smc.category_name = %@", @"'Simple Templates'"];



    const char *sql = [selectSQL UTF8String];



    sqlite3_stmt *selectStmt;



    if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) == SQLITE_OK){



      while(sqlite3_step(selectStmt) == SQLITE_ROW) 

      {     

        //

        char *localityChars = (char*)sqlite3_column_text(selectStmt, 0);

        if (localityChars == NULL)

          maxValuePosition = nil;

        else

          maxValuePosition = [NSString stringWithUTF8String: localityChars];



          // increment the postion value

          int postion = [maxValuePosition intValue] + 1;



          NSLog(@"%d look here %@ gtitle", postion , title);



          selectStmt = nil;



          //saving a new simple phrase is started here

          sql = "insert into storyboard_phrases(phrase) Values(?)";



          if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) == SQLITE_OK){



              sqlite3_bind_text(selectStmt, 1, [title UTF8String], -1, SQLITE_TRANSIENT);

          }



          if(sqlite3_step(selectStmt) != SQLITE_DONE ) {



              NSLog( @"Error: %s just here itself", sqlite3_errmsg(database) );



          } else {

              NSLog( @"Insert into row id = %d", sqlite3_last_insert_rowid(database));



              ///



              int phrase_id = sqlite3_last_insert_rowid(database);



              int sub_category_id = 0;



              selectStmt = nil;



              NSString *selectSQL = [NSString stringWithFormat:@"select id from storyboard_main_categories where category_name = %@", @"'Simple Templates'"];       



              sql = [selectSQL UTF8String]; 



              if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) == SQLITE_OK) 

              {         

                  while(sqlite3_step(selectStmt) == SQLITE_ROW) 

                  {                 

                      char *localityChars = (char*)sqlite3_column_text(selectStmt, 0);



                      NSString* main_category_id = [NSString stringWithUTF8String: localityChars];



                      sql = "insert into phrase_reference (phrase_id, sub_category_id,main_category_id, position) Values(?,?,?,?)";



                      if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) == SQLITE_OK){



                          sqlite3_bind_int(selectStmt, 1, phrase_id);



                          sqlite3_bind_int(selectStmt, 2, sub_category_id);



                          sqlite3_bind_int(selectStmt, 3, [main_category_id intValue]);



                          sqlite3_bind_int(selectStmt, 4, postion);



                      }



                      if(sqlite3_step(selectStmt) != SQLITE_DONE ) {

                          NSLog( @"Error: %s", sqlite3_errmsg(database) );

                      }else {

                          NSLog( @"Insert into row id = %d", sqlite3_last_insert_rowid(database));

                          returnVal = YES;

                      }

                  }

              }

              sqlite3_finalize(selectStmt);



              selectStmt = nil;





              /////

          }

      }

    }

    sqlite3_finalize(selectStmt);



  }

    NSLog(@"sdsdfsdsd closed");

  sqlite3_close(database);



  return returnVal;



}