Error Code: 1136. Column count doesn't match value count at row 1

CREATE TABLE `a_messages2` (
  `a_messages_id` int(11) NOT NULL auto_increment,
  `conversation_id` bigint(20) default NULL,
  `profile_id` varchar(20) default NULL,
  `sender` varchar(20) default NULL,
  `message_id` bigint(20) default NULL,
  `message_text` varchar(1000) default NULL,
  `dateAgo` varchar(20) default NULL,
  `message_read` tinyint(4) default NULL,
  `this_user` varchar(20) default NULL,
  PRIMARY KEY  (`a_messages_id`),
  UNIQUE KEY `unique_message_id` (`message_id`)
)




CREATE TABLE `a_messages3` (
       `a_messages_id` INT (11) auto_increment
     , `profile_id` VARCHAR(20)
     , `sender` VARCHAR(20)
     , `message_id` BIGINT (20)
     , `this_user` VARCHAR(20)
     , PRIMARY KEY (a_messages_id)
     , INDEX profile_id (profile_id)
     , INDEX profile_id_and_message_id (profile_id,message_id)
     );


insert into a_messages3 select profile_id,sender,message_id,this_user from a_messages2

Error Code: 1136. Column count doesn't match value count at row 1