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 ('dc07ffe4c8458ce7ec08ef8d6f0f3db5', -1, 1713909939, 1713909939, '12de43fb', -4, 0, 0)

Line : 187
File : sessions.php