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 ('195452e3f00fd58c9486d1f28049741e', -1, 1714000876, 1714000876, '12dbec3e', 0, 0, 0)

Line : 187
File : sessions.php