How to avoid duplicate pages?

Hi,
I wonder if someone knows how to get rid of duplicate pages on my outdated joomla website…
Joomla version is 1.5.26 (it is full demand season and can't update it now)
It is using sh404sef version 2.1.1.644
So I have a lot of duplicated pages like:
index.php?option=com_content&Itemid=139&id=55&lang=es&limit=10&view=category
index.php?option=com_content&Itemid=139&id=55&lang=es&limit=5&view=category
index.php?option=com_content&Itemid=139&id=55&lang=es&view=category
etc..
they all go…
How to avoid duplicate pages?

See original post by casan