phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'bf67defeba5042a8bb2c1c841e6c9cda' 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 ('bf67defeba5042a8bb2c1c841e6c9cda', -1, 1777009504, 1777009504, '2e251811', -9, 0, 0)

Line : 187
File : sessions.php