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 ('7e1d8653a3ec8e629263f266d35870c3', -1, 1714002617, 1714002617, '0391baad', -2, 0, 0)

Line : 187
File : sessions.php