phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9e1f707f8c01d742e19ab01487db3fb5' 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 ('9e1f707f8c01d742e19ab01487db3fb5', -1, 1771026998, 1771026998, 'd849d88a', -4, 0, 0)

Line : 187
File : sessions.php