phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1ef524b56c59a7ea6f46e0f09d6c1228' 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 ('1ef524b56c59a7ea6f46e0f09d6c1228', -1, 1526818035, 1526818035, '365cad09', 4, 0, 0)

Line : 187
File : sessions.php