phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8aa57743d6308d83a6c83ab2f6a30061' 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 ('8aa57743d6308d83a6c83ab2f6a30061', -1, 1771150177, 1771150177, 'd849d874', 28, 0, 0)

Line : 187
File : sessions.php