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 ('d2f6dbd8f6b5f9cdbcae2e7c3e54500c', -1, 1737483725, 1737483725, '1275977f', 6, 0, 0)

Line : 187
File : sessions.php