phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a78aecbfe8f21f609f0e674eb5466522' 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 ('a78aecbfe8f21f609f0e674eb5466522', -1, 1769634656, 1769634656, 'c0a81010', -9, 0, 0)

Line : 187
File : sessions.php