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 ('03b2d90fd0e4f746cd76698a2f464ba5', -1, 1713988514, 1713988514, '039173c3', -4, 0, 0)

Line : 187
File : sessions.php