phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fc7775c9c61241490d28fa150c689f9d' 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 ('fc7775c9c61241490d28fa150c689f9d', -1, 1776477741, 1776477741, 'd849d92f', -4, 0, 0)

Line : 187
File : sessions.php