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 ('fab98cd71e31155d9311f5d41c36b77f', -1, 1711633116, 1711633116, '22cbdd68', -7, 0, 0)

Line : 187
File : sessions.php