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 ('780e221d9de8dc5a4578dfefff745670', -1, 1714005872, 1714005872, '039102b8', -4, 0, 0)

Line : 187
File : sessions.php