CRM 2015 online Solution import failed

I am trying to import unmanaged solution in Test Environment(2015 online update) and the Import is failed due to Workflow(but it is a business rule)

Error is 0x80040217 processtrigger With Id = [GUID] Does Not Exist

I checked in DEV & TEST environment and both environments have this Business rules with same GUID and Same GUID for processtrigger.

Note : The same solution i tried to imported couple of weeks back from Dev to Test and it was successful. 

Import is being failed if solution contains entity(System or Custom) with Business Rules. Even solution import fails even if the solution is imported to same environment(DEV) from where it is exported. 

Import is being successful if solution contains entity(System or Custom) with no Business Rules.

Any help is appreciated.

Thanks In advance.

Hari.