phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '76773b0a9649a693f60a197ea8e1e28f' 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 ('76773b0a9649a693f60a197ea8e1e28f', -1, 1768657455, 1768657455, 'd849d82b', -4, 0, 0)

Line : 187
File : sessions.php