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 ('3237d91673916681d8503722cc3ff71d', -1, 1713589204, 1713589204, '0d3a97e7', -4, 0, 0)

Line : 187
File : sessions.php