phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '990501824449c45d6d72543780c2f020' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('990501824449c45d6d72543780c2f020', -1, 1766304860, 1766304860, 'd849d8d9', -4, 0, 0)

Line : 187
File : sessions.php