Need help getting rid of unwanted script at top of page

It looks like this -

Strict Standards: Declaration of Tag::fieldIsUnique() should be compatible with Omeka_Record::fieldIsUnique($field, $value = NULL) in /home/ej7/ on line 0

How can I get rid of it?
For some reason I can’t post the a link to the site. It is the Omeka section of

Looks like you’re running an older version of Omeka. Updating might fix the issue, but if that’s not an option, you could try this:

For upgrading from 1.x to 2.x, see detailed instructions here: