phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ba8a6b8f396b9f130ddd97d1ba1df005' 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 ('ba8a6b8f396b9f130ddd97d1ba1df005', -1, 1771817167, 1771817167, 'd849d8dd', 2, 0, 0)

Line : 187
File : sessions.php