phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'eec9dfd7228633cfffd2b1fc0e5bf9e9' 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, session_admin) VALUES ('eec9dfd7228633cfffd2b1fc0e5bf9e9', -1, 1777780923, 1777780923, 'd849d93c', 0, 0, 0)

Line : 187
File : sessions.php