Master detail edit or add not working

I have a very simple master detail setup with shifts and employee

shifts (
  id int(11) NOT NULL AUTO_INCREMENT,
  Data date NOT NULL,
  StartHour varchar(10) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NOT NULL,
  Hours decimal(4, 1) NOT NULL DEFAULT 6.0,
  ServiceType int(11) NOT NULL DEFAULT 0,
  Notes text NOT NULL,
  guidx varchar(50) DEFAULT UUID(),
  `S AIB` bit(1) DEFAULT NULL,
  Confirmed bit(1) DEFAULT b'0',
  Relation text DEFAULT ' ',
  PRIMARY KEY (id)
)

EmployeeShifts (
  id int(11) NOT NULL AUTO_INCREMENT,
  IdShifts int(11) NOT NULL,
  IdEmployee int(11) NOT NULL,
  shiftmanager bit(1) DEFAULT b'0',
  driver bit(1) DEFAULT b'0',
  PRIMARY KEY (id)
)

Previusly with version 2023 and 2024 was working fine, now (after upgrading to 2025.2) I can insert EmployeeShifts only individually but from master detail, even if success message appears.

Do you have some suggestion?

What error did you get during Master/Detail add? You can enable Generate → Debug and Tools → Advanced Settings → Log to file / Log SQL to check for any error messages and the running SQLs.

Hi,
There is no error. I was already cheking logs.
when adding or editing grid child, after pressing save, I see the UPDATE on master table but no INSERT for the child record.