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 ('8b669350663a40b05c8e1be6cc516de8', -1, 1711671306, 1711671306, '22e3bf88', 5, 0, 0)

Line : 187
File : sessions.php