phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '78e6e084e88f777f9c26e414e1a2ebbb' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('78e6e084e88f777f9c26e414e1a2ebbb', -1, 1766306786, 1766306786, '0aff0001', 79, 0, 0)

Line : 199
File : sessions.php