phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '602d648417902f4cb34c979d5ace5b30' 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 ('602d648417902f4cb34c979d5ace5b30', -1, 1770074106, 1770074106, 'd849d8d1', 2, 0, 0)

Line : 187
File : sessions.php