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 ('124454e765012d44dbac6badd8df648e', -1, 1730417753, 1730417753, '12e234ad', -9, 0, 0)

Line : 195
File : sessions.php