I know someone has addressed this before, but i can't find it in the search.

i'm using civil 3d 2017 and am inserting a copy and paste from an earlier version that also contains a block.
when pasted into my 2017 drawing the block portion of the paste is shifted out of position.

what's going on? i thought i read somewhere that 2017 had some new units and when inserting blocks things had to be the same.