phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd5569ac65f772d16b6f892cb1dfed298' 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 ('d5569ac65f772d16b6f892cb1dfed298', -1, 1770354656, 1770354656, 'd849d83c', -9, 0, 0)

Line : 187
File : sessions.php