phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'cec8aad60ea39853b5fc9b00f5d40d2f' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('cec8aad60ea39853b5fc9b00f5d40d2f', -1, 1770186664, 1770186664, 'd849d892', -2, 0)

Line : 170
File : sessions.php