CREATE TABLE `v2_chg_history` (
	`seq` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '순번',
	`vr_sq` BIGINT(20) UNSIGNED NOT NULL COMMENT '검증요청순번',
	`stat_cd` VARCHAR(6) NOT NULL COMMENT '상태코드' COLLATE 'utf8mb3_uca1400_ai_ci',
	`chg_type` VARCHAR(10) NOT NULL COMMENT '변경유형' COLLATE 'utf8mb3_uca1400_ai_ci',
	`memo` TEXT NULL DEFAULT NULL COMMENT '메모' COLLATE 'utf8mb3_uca1400_ai_ci',
	`insert_id` VARCHAR(60) NOT NULL COMMENT '등록자ID' COLLATE 'utf8mb3_uca1400_ai_ci',
	`insert_tm` DATETIME NOT NULL COMMENT '등록시간',
	PRIMARY KEY (`seq`) USING BTREE,
	INDEX `vr_sq` (`vr_sq`) USING BTREE
)
COMMENT='변경이력'
COLLATE='utf8mb3_uca1400_ai_ci'
ENGINE=InnoDB
AUTO_INCREMENT=81103559
;
<?php
namespace App\Models;   

use CodeIgniter\Model;

class V2chgstatModel extends Model
{
    protected $table      = 'v2_chg_history';
    protected $primaryKey = 'seq'; // 실제 PK 컬럼명으로 수정하세요 (st_date, cpid, gbn_cd가 복합키인 경우도 있음)
    protected $allowedFields = ['vr_sq', 'stat_cd', 'chg_type', 'memo', 'insert_id', 'insert_tm'];
   
    protected $useTimestamps = false; // insert_tm을 직접 넣으시므로 false

    /**
     * 상태 변경 이력 저장 (CI4 통합 버전)
     * @param array $data ['vr_sq' => 값, 'stat_cd' => 값, ...]
     * @param string $saveType 'I'(Upsert), 'U'(Update)
     */
    public function v2_savehistory(array $data )
    {
        $payload = [
            'vr_sq'     => $data['vr_sq'],
            'stat_cd'   => $data['stat_cd'],
            'chg_type'  => $data['chg_type'],
            'memo'      => $data['memo'] ?? '',
            'insert_id' => $data['insert_id'] ?? '0',
            'insert_tm' => $data['insert_tm'] ?? db_now(),
        ];

        // insert 수행
        if (!$this->insert($payload)) {
            return [
                'error' => [
                    'code'    => $this->db->error()['code'],
                    'message' => $this->db->error()['message'],
                ],
                'query' => (string)$this->getLastQuery()
            ];
        }

        return ['error' => ['code' => 0, 'message' => ''], 'id' => $this->getInsertID()];
    }
}