phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '5a389c5c74ee30514080b9c33802d9e9' 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 ('5a389c5c74ee30514080b9c33802d9e9', -1, 1508285697, 1508285697, '36a6e8f3', 16, 0, 0)

Line : 187
File : sessions.php