Unable to change the design extents

I have OrCAD PCB professional 17.2 with hotfix 052.

I have imported the board file which was designed in altium tool. After the successful translation of altium file I found the design extents are very large roughly in -4000000.00 in X,Y coordinate.

If i try to contract the extents i m getting the error as attached in the image.

Is there any possiblity to contract extents ? this issue i m facing when i import altium file to OrCAD PCB