phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6c1919afb4aec4227d460d92c5d70766' 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 ('6c1919afb4aec4227d460d92c5d70766', -1, 1770467520, 1770467520, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php