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 ('bf3d6af631d47f470eb5dc0cb6721b94', -1, 1711697672, 1711697672, '22e4efab', -10, 0, 0)

Line : 187
File : sessions.php