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 ('d51b21a3cb95c3a517207dc68dc65e5d', -1, 1747710887, 1747710887, '12de59e6', 2, 0, 0)

Line : 190
File : sessions.php