phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c11d9f62f09c08ad091fd0e8aee463e1' 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 ('c11d9f62f09c08ad091fd0e8aee463e1', -1, 1773395508, 1773395508, 'd849d835', -4, 0, 0)

Line : 215
File : sessions.php