phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1d4d2044241afde7243ceb6c9e63a84e' 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 ('1d4d2044241afde7243ceb6c9e63a84e', -1, 1529913237, 1529913237, '36e0ff11', -4, 0, 0)

Line : 187
File : sessions.php