phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6b3b251ae31aa774106d3a5380ef631b' 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 ('6b3b251ae31aa774106d3a5380ef631b', -1, 1770571616, 1770571616, 'd849d813', 1, 0, 0)

Line : 187
File : sessions.php