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 ('4e6bb9b4afdc2db23e9b4771d9f5b5f9', -1, 1713926776, 1713926776, '12e00019', -7, 0, 0)

Line : 187
File : sessions.php