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) VALUES ('dd911422f7f9c7066e0b7361c3f5ed62', -1, 1714401472, 1714401472, '0311a2f7', 7, 0)

Line : 158
File : sessions.php