How to count if your column has the same values on another column in separate related table

I wanted to count the values that has the same position on my table and with my previous related table.

What I did was

=Calculate(Countrows(Table1,Filter(Table1,Table1[Position] = Table2[Position])

1ST Table

**ID    Position**
3383669 Manager
3482615 Associate
3372059 Sr Associate
3362498 Associate
2150465 Associate

2ND Table

**ID    Position**
3383669 Director
3482615 Sr Associate
3372059 Manager
3362498 Associate
2150465 Associate

I'm expecting that the answer would be 2 as two ID has the same positions from previous to recent.

What I did was

=Calculate(Countrows(Table1,Filter(Table1,Table1[Position] = Table2[Position])

I expect that 2 as two ID has the same positions from previous to recent.

It only showed

Error This can happen when a measure formula refers to a column that contains many values without

you can try this

measure =
VAR tbl =
    ADDCOLUMNS (
        Table1,
        "check",
            IF (
                MAXX (
                    FILTER (
                        Table2,
                        Table1[ID] = Table2[ID]
                            && Table1[Position] = Table2[Position]
                    ),
                    Table2[Position]
                ) = Table1[Position],
                1,
                0
            )
    )
RETURN
    SUMX ( tbl, [check] )