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 ('9405a1948b8dc80f7b2bfc28aa7d60a6', -1, 1713507487, 1713507487, '12be9c50', -4, 0, 0)

Line : 187
File : sessions.php