After upgrading vRA from 7.5 to 7.6 , following services might show up as unavailable
advanced-designer-service - UNAVAILABLE
o11n-gateway-service -UNAVAILABLE
shell-ui-app - UNAVAILABLE
vco - null
Going through logs you might see following exception
com.vmware.o11n.sdk.exception.RestApiException: com.vmware.o11n.service.version.ContentVersionException: org.springframework.dao.IncorrectResultSizeDataAccessException: query did not return a unique result: 2;
nested exception is javax.persistence.NonUniqueResultException: query did not return a unique result: 2
To resolve, check the vmo_contentversioncontrol table in vRA's Postgres database to see if there is a duplicate __SYSTEM record. if so, remove the one with id = 2
This is how that table should look
Once the second id is removed , services should start properly.
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