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 ('a1a2f9fb502198ce2915076a415d6a64', -1, 1730415806, 1730415806, '12e32e4c', -1280, 0, 0)

Line : 195
File : sessions.php