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 ('6b8f755a1c11dcc7478f9e58730895dd', -1, 1730418044, 1730418044, '030f0487', -1280, 0, 0)

Line : 195
File : sessions.php