phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '0fdd0e6af98cbd8f3109519c3c2f978b' 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 ('0fdd0e6af98cbd8f3109519c3c2f978b', -1, 1770639346, 1770639346, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php