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 ('1906a3b2bc17077a82001cb155c2a98a', -1, 1748419647, 1748419647, '0d3ac7ce', -2, 0, 0)

Line : 189
File : sessions.php