Help to create a column with data from table B in table A

Hello,

I'm newbie with Power BI and always that I with some trouble you guys help me and I appreciate for this.

Well, here I am with one more trouble.

I have two tables:

Table "Before:"

Table "After":

So what i need?

I need to create a measure (or column, whatever it's easier) on table "Before" to see the column "ERROR" from "After" but the rows from Before that doen't exist on "After" must be filled with "Done"

Expected output:

Table "Before"

I linked both tables using the following relantionship:

Base 1 = Table Before

Base Chile LBD = Table After

PL = Columns Order + Row (to create a unique key)

That's it, i hope someone could help me and if i wasn't clear enough, please, let me know