I am trying to validate Knowledge__kav object and it has related lookup filter to some other custom object. This validation is done through ant. The issue occurs when i try to deploy this related lookup filter, it says "Cannot specify 'lookupFilter' for a CustomField of type Lookup for entity Knowledge__kav". If i comment the lookup filter section from object file of the extracted source, the deployment succeeds. I have mentioned the related lookup filter field in package.xml as well.
If anybody has any suggestions please suggest.