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 ('896a4677ace06f59e7cc18f1db0e4a33', -1, 1708885744, 1708885744, '03eb916c', -1, 0, 0)

Line : 187
File : sessions.php