How to make form text item nullable?

I created an Apex form using wizard.
It had a text item which was not null column in database. Now I made the column nullable in database.
However, in Apex form, it still refuses to accept any null value in that text item.
Where do I need to change in form to make it nullable?
Thanx

Hi,
Has the wizard created a not null validation for the column that was originally not null. Check validations and remove the entry.
Regards
Paul

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