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 ('a343d567b8fdb25bcb8b32d5327e9241', -1, 1730432390, 1730432390, '0391427e', -1, 0, 0)

Line : 195
File : sessions.php