Hi Mani,
These are db sync errors that can be quite hard to resolve.
First do a compile via ax build, then try and trigger a database sync via command line. Open the command prompt as the admin user in ax. Run the following command to start ax and also trigger a database sync. Ax32.exe -startupCmd=Synchronize
A more dirty solution would be to drop the PFRegNum_RU column from the companyInfo table. Only do this if you are not using this column.
Regards,
Koen