polygonZM---> poliygon

ArcToolbox > Conversion Tools > To Shapefile > Feature Class To Shapefile (multiple)

Click on the ‘Environments...‘ button at the bottom of the dialog box. To the right of the ‘OK‘ button.

Click on the ‘General Settings‘ text.

You should see two fields marked ‘Output has Z Values‘ and ‘Output has M Values‘.

Set both fields to ‘Disabled‘.

You should now have copies of your original shapefiles, without Z & M values in your new folder.