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) VALUES ('4d01c1f686c2f992ac9a4e12c7cbba1a', -1, 1714404318, 1714404318, '030f064d', 18, 0)

Line : 158
File : sessions.php