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 ('17b69c03b2a1933ec5fcaa843bae6d61', -1, 1730418089, 1730418089, '038570ab', 27, 0, 0)

Line : 195
File : sessions.php