After enabling the Enable agent count feature, one or more agents may not be listed on the Agent workspace.
CCS 12.6.1
CCS could not update the property of those assets due to other concurrent operations with those assets.
To work around this issue, the assets must be manually updated by performing the following steps:
(!symc-csm-AssetSystem-Asset-AssetBase-IsAgentBased=*)
This query result lists all the assets for which the isAgentBased property is not set.