CONCEPT_SYNONYM has Invalid and nonstandard concepts present

Thank you @Dymshyts and @Christian_Reich!
As I am now able focus my attention on OMOP, much is becoming clear to me.

If you have a chance, could you please take a look at a topic that I posted on the Vocabulary group?

I will be sure to inquire should I encounter any errors or holes. Actually the question in the topic I mention above might suggest such. Though I would imagine an apparent ‘hole’ just means that no one has had time to address a particular need, given the prioritization needed.

Best,
Gerry