phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fc23358eef2475d86fa3feeec1f09db3' 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 ('fc23358eef2475d86fa3feeec1f09db3', -1, 1769609159, 1769609159, 'd849d8d0', -4, 0, 0)

Line : 187
File : sessions.php