phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'aa430678c9c627cb2fa1ffde4ef0abc5' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('aa430678c9c627cb2fa1ffde4ef0abc5', -1, 1516212628, 1516212628, '36ea414e', 2, 0, 0)

Line : 187
File : sessions.php