phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('dbc50eb32c13cc95429599b38cde8e0a', -1, 1737556737, 1737556737, '12776e4c', -9, 0, 0)

Line : 187
File : sessions.php