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 ('f4c48ed0f26676b53ad0a206cff39800', -1, 1711614580, 1711614580, '12ccd6cd', -1, 0, 0)

Line : 187
File : sessions.php