phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9af8a78762e42fc38ded573031e06050' 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 ('9af8a78762e42fc38ded573031e06050', -1, 1769583052, 1769583052, 'd849d869', -9, 0, 0)

Line : 187
File : sessions.php