AX7 Data Entity: Cannot create a record in Entity (DMFEntity)

Severity    Code    Description    Project    File    Line    Suppression State
Error        Infolog diagnostic message: 'Error synching entity metadata for entity - KRTProductEntity. Message -    at Microsoft.Dynamics.Ax.MSIL.Interop.throwException(Int32 ExceptionValue, interpret* ip)            0    
Error        at Dynamics.AX.Application.DmfDataPopulation.syncEntityUpdate(DMFEntity dmfEntity, DictDataEntity dictDataEntity)            0    
Error        at Dynamics.AX.Application.DMFEntity.insert() in xppSource://Source/ApplicationFoundation\AxTable_DMFEntity.xpp:line 433            0    
Error        Infolog diagnostic message: 'Cannot create a record in Entity (DMFEntity). Entity: Items, KRTProductStaging.            0    
Error        at Dynamics.AX.Application.DmfDataPopulation.syncEntityUpdate(DMFEntity dmfEntity, DictDataEntity dictDataEntity, Boolean useTargetEntityName, Boolean @useTargetEntityName_IsDefaultSet) in xppSource://Source/ApplicationFoundation\AxClass_DmfDataPopulation.xpp:line 947            0    
Error        at Dynamics.AX.Application.DmfDataPopulation.syncEntityMetadata(StringCollection dataEntityViewCollection, StringCollection compositeEntityList) in xppSource://Source/ApplicationFoundation\AxClass_DmfDataPopulation.xpp:line 794.' on category 'Error'.            0    
Error        at Dynamics.AX.Application.DmfDataPopulation.syncEntityCreate(DictDataEntity dictDataEntity, Boolean useTargetEntityName, Boolean @useTargetEntityName_IsDefaultSet) in xppSource://Source/ApplicationFoundation\AxClass_DmfDataPopulation.xpp:line 899            0    
Error        at Dynamics.AX.Application.DmfDataPopulation.syncEntityCreate(DictDataEntity dictDataEntity, Boolean useTargetEntityName)            0    
Error        at Microsoft.Dynamics.Ax.Xpp.Common.Insert()            0    
Error        at Microsoft.Dynamics.Ax.MSIL.cqlCursorIL.insert(IntPtr table)            0    
Error        at Microsoft.Dynamics.Ax.Xpp.NativeCommonImplementation.Insert()            0    
Error        Database synchronization failed. You may have to do a full build of the package 'VKRetail' and all of its dependent packages.            0    
Error        The record already exists.' on category 'Error'.            0    

class DeleteDMFEntity
{        
    public static void main(Args _args)
    {      
        DMFEntity dmfEntity;
        DMFTargetXML dmfTargetXML;

         //ttsbegin;
        delete_from dmfEntity;
        delete_from dmfTargetXML;

         /*while select forupdate dmfEntity
        {
            dmfEntity.delete();
        }*/
        //ttscommit;
        info('Done');
    }
}