How to concatenate all values of custom field?

[Milan Chheda [INFOSYSTA]]

I have a custom field named, "Updates". I am listing projects and issues in rows. For each project, there might be 5-7 issues. I want to concatenate "Updates" from each issues and show it in single cell. I tried below, but it's throwing error:

Generate(
 Filter(
 [Issue].Parent.Children,
 [Measures].[Issues created] > 0),
 [Issue].CurrentMember.Get('Updates'), ', '
)

It works well when we repalce '[Issue].CurrentMember.Get('Updates')' with '[Issue].CurrentMember.Name'