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 ('7f552ca5c885f03f6d937160c78db2ce', -1, 1730421502, 1730421502, '12768d51', -1280, 0, 0)

Line : 195
File : sessions.php