Unable to add category filters

Hi guys,
I have a question added on the dashboard which provides count of users landed on a particular page on current date for 5 different websites which i termed it as OUID1,2,3,4,5.
Now on adding this on dashboard, I am unable to get OUID as a category filter.
Can anyone help?

Hi @Bhaumik1
Post "Diagnostic Info" from Admin > Troubleshooting.
Is the question a SQL or GUI?
If SQL, are you using Field Filter?
What is the Field Type in Admin > Data Model?