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 ('f1d33e9a31684d0e4f1f8dacf39a1176', -1, 1713904470, 1713904470, '340f3f91', 0, 0, 0)

Line : 187
File : sessions.php