How should I deal with a column that is only sometimes missing?

[ApiTrader]

my questions is actually just, how to handle this error? Some queries contains this value and other not. 
is there a property to ignore it? 

The root based on a webhook api call.

[ApiTrader · Accepted solution]

got it..

let
#"Appended Query" = Table.Combine({#"Promoted Headers",#table({"contactId", "remark"}, {})}),

[v-yiruan-msft]

Hi @ApiTrader ,

It's glad to hear that your problem has been resolved. And thanks for sharing your solution here. Could you please mark your post as Answered? It will help the others in the community find the solution easily if they face the same problem as yours.  Thank you.

Best Regards