No estoy seguro de cuál es este error!

#1292 - Truncated incorrect DOUBLE value: 

¡No tengo doble campo de valor o datos!

¡He perdido una hora entera tratando de resolver esto!

aquí está mi consulta

INSERT INTO call_managment_system.contact_numbers 
    (account_id, contact_number, contact_extension, main_number, created_by)
SELECT
    ac.account_id,
    REPLACE(REPLACE(REPLACE(REPLACE(ta.phone_number, '-', ''), ' ', ''), ')', ''),'(','') AS Phone,
    IFNULL(ta.ext, '') AS extention,
    '1' AS MainNumber,
    '2' AS created_by
FROM 
    cvsnumbers AS ta
    INNER JOIN accounts AS ac ON ac.company_code = ta.company_code
WHERE 
    LENGTH(REPLACE(REPLACE(REPLACE(REPLACE(ta.phone_number, '-', ''), ' ', ''), ')', ''),'(','') ) = 10

Aquí está mi tabla de creación de programas para la tabla en la que se muestran los resultados.

CREATE TABLE `contact_numbers` (  
    `number_id` int(10) unsigned NOT NULL AUTO_INCREMENT,  
    `account_id` int(10) unsigned NOT NULL DEFAULT '0',  
    `person_id` int(11) NOT NULL DEFAULT '0',  
    `contact_number` char(15) NOT NULL,  
    `contact_extension` char(10) NOT NULL DEFAULT '',  
    `contact_type` enum('Primary','Direct','Cell','Fax','Home','Reception','Office','TollFree') NOT NULL DEFAULT 'Primary',  
    `contact_link` enum('Account','PDM','Other') NOT NULL DEFAULT 'Account',  
    `status` tinyint(1) NOT NULL DEFAULT '1' COMMENT '0 = inactive, 1=active', 
    `main_number` tinyint(1) NOT NULL DEFAULT '0' COMMENT '1 = main phone number',  
    `created_on` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,  
    `created_by` int(11) NOT NULL,  
    `modified_on` datetime DEFAULT NULL,  
    `modified_by` int(11) NOT NULL DEFAULT '0',  
    PRIMARY KEY (`number_id`),  
    KEY `account_id` (`account_id`),  
    KEY `person_id` (`person_id`)
) ENGINE=InnoDB AUTO_INCREMENT=534 DEFAULT CHARSET=utf8