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 ('8e027f241829464197abbe4223b21cf9', -1, 1737396358, 1737396358, '12610e59', 0, 0, 0)

Line : 189
File : sessions.php