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 ('5b7f7de8e5f6c57f4a011d9a93595ffc', -1, 1780673925, 1780673925, 'd849d8e8', 2, 0, 0)

Line : 189
File : sessions.php