phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '45863e00392e3a69d52b0bbeb8adf039' 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 ('45863e00392e3a69d52b0bbeb8adf039', -1, 1513574104, 1513574104, '36e2e3af', 4, 0, 0)

Line : 187
File : sessions.php