Unable to find collumn in table

I have issue when I type expression bellow

But when I try the expression on Valid If collumn it works find

Any Idea?

Database is your table name it seems and in the first picture you have an expression:
[_THISROW].[Database] which is interpreted as a column. You can’t refer to a tablename like this. Your expression in second image is correct because you refer to a List with TableName[ColumnName] structure.

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And this post is duplicate of

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