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 ('6a1bf3a6f0292e0fce7f2aaecd81bb4e', -1, 1740079402, 1740079402, '12dd1608', 0, 0, 0)

Line : 189
File : sessions.php