ALTER TABLE `company_settings` ADD COLUMN `seal_path` VARCHAR(255) NULL AFTER `logo_path`;
ALTER TABLE `users` ADD COLUMN `signature_path` VARCHAR(255) NULL AFTER `active`;
ALTER TABLE `offers` ADD COLUMN `created_by` BIGINT UNSIGNED NULL AFTER `approved_by`, ADD KEY `offers_created_by_index` (`created_by`), ADD CONSTRAINT `offers_created_by_fk` FOREIGN KEY (`created_by`) REFERENCES `users` (`id`) ON DELETE SET NULL;
ALTER TABLE `invoices` ADD COLUMN `created_by` BIGINT UNSIGNED NULL AFTER `offer_id`, ADD KEY `invoices_created_by_index` (`created_by`), ADD CONSTRAINT `invoices_created_by_fk` FOREIGN KEY (`created_by`) REFERENCES `users` (`id`) ON DELETE SET NULL;