phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('5334f421861cd88e5443b5d15117c863', -1, 1711692420, 1711692420, '03ec4008', 3, 0, 0)

Line : 187
File : sessions.php