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 ('91a4af65233a0033b11c0752fe9fb2c1', -1, 1713568597, 1713568597, '12d8ef2e', -4, 0, 0)

Line : 187
File : sessions.php