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 ('0846ae9a0b75be65b7cb6fc68679761f', -1, 1713503857, 1713503857, '0391831c', -4, 0, 0)

Line : 187
File : sessions.php