Unable to cancel the material request

Unable to cancel the material request and showing a message called

Group node warehouse is not allowed to select for transactions.

I checked with warehouse master, I changed the ware house as Group node. I tried to convert the warehouse group to non-group but failed to convert.

How to cancel the material request.

Change the warehouse of the items and try.

Hi,
All warehouses get converted to a group.
To convert warehouse to non-group, edit group warehouse and convert it to non-group.