phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7025a2ec992f4cdbd711824b7367cebe' 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 ('7025a2ec992f4cdbd711824b7367cebe', -1, 1503564659, 1503564659, '36a7c354', 14, 0, 0)

Line : 187
File : sessions.php