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 ('85a5b36a13df7fb3d557a55177ca3f25', -1, 1713914902, 1713914902, '12dc9a29', -4, 0, 0)

Line : 187
File : sessions.php