phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51853bcf010149842d65e094ffb14b08' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('51853bcf010149842d65e094ffb14b08', -1, 1763331358, 1763331358, 'd849d830', -9, 0, 0)

Line : 187
File : sessions.php