phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a559e287e7da67573f23bde755a91f7d' 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 ('a559e287e7da67573f23bde755a91f7d', -1, 1542649713, 1542649713, '36eb306a', 1, 0, 0)

Line : 187
File : sessions.php