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 ('dcd984d5643d0f5a0b0c03e220f24e0b', -1, 1711713186, 1711713186, '36c46a6a', -10, 0, 0)

Line : 187
File : sessions.php