We have a on prem 2013 SharePoint farm 2 WFE and an application server. Our Search is throwing the following errors:
The mount operation for the gatherer application 37804509-7ebe-4dd0-80f6-846e90d288e9-crawl-0 has failed because the schema version of the search gatherer database is less than the minimum backwards compatibility schema version supported for this gatherer application. The database might not have been upgraded.
As this is a production environment, we are reluctant to rebuild for fear of taking SharePoint offline.
I have looked and there is a lot of information for 2010 and not so much for 2013.
Looking for help