phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fd8cc2e7270c7769d95d03b21868fc42' 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 ('fd8cc2e7270c7769d95d03b21868fc42', -1, 1770969498, 1770969498, 'd849d821', -9, 0, 0)

Line : 187
File : sessions.php