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 ('a030f67b52e06cea9f96fa0f6e31225e', -1, 1711695411, 1711695411, '36513d0e', -7, 0, 0)

Line : 187
File : sessions.php