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 ('e9ec94edcab9779e691ab2db0f0d99d2', -1, 1730420336, 1730420336, '0d3b1b8d', 2, 0, 0)

Line : 195
File : sessions.php