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 ('9a7e3e0236721d2c5c2d7a5a1fdcbd30', -1, 1714659591, 1714659591, '03913f88', -4, 0)

Line : 158
File : sessions.php