heidi sql grid editing error: column #4 not available

I get this error when I try to add a new row to Data table.

I created 2 tables before this one and it worked fine, but with this one I can't add data to the table.

Like this: I am placed in table e.x. "reservations". Then I head to Data tab and down there I do right click "Insert row". And then I got this error.

Please post the result of SHOW CREATE TABLE reservations; here.

And please verify you are using the latest release 12.8 or even better the latest nightly build.

This is the result of "show create table": CREATE TABLE rezervacija ( id int(11) NOT NULL AUTO_INCREMENT, korisnik_id int(11) NOT NULL, knjiga_id int(11) NOT NULL, datum_rezervacije date NOT NULL, datum_otkaza datetime DEFAULT NULL, PRIMARY KEY (id), KEY korisnik_id (korisnik_id), KEY knjiga_id (knjiga_id), CONSTRAINT rezervacija_ibfk_1 FOREIGN KEY (korisnik_id) REFERENCES korisnik (id) ON DELETE CASCADE, CONSTRAINT rezervacija_ibfk_2 FOREIGN KEY (knjiga_id) REFERENCES knjiga (id) ON DELETE CASCADE ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci

And version of MariaDB is: 10.5.26-MariaDB-0+deb11u2