phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fd1bf1da78133d91bb9849c2949d68fa' 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 ('fd1bf1da78133d91bb9849c2949d68fa', -1, 1769894096, 1769894096, 'd849d851', -4, 0, 0)

Line : 187
File : sessions.php