Understanding DB* commands

I have C-Gate running, and have used Toolkit to make some changes. If I connect to C-gate and type:

DBVERIFY
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I get lots of differences (238 in my case).

As I understand it, TK saves the project on any change (just looking at when the .XML and .XML.old files get updated), so I don't understand why the database isn't accurate (assuming my project matches the network, which it should). The differences I'm shown are a bit vague too:

19 missing from C-Bus (Group not defined in C-Gate)
136 missing from C-Bus (Application not defined in C-Gate)
(no clue as to which network)
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Clearly I don't understand how the DB fits into the picture, unless the list I am given really does just tell me that we have lots of things different between the project and the network?

The reason I'm playing with this is that I need to update several hundred group address names, and want to do it programatically using DBSET <net>/<app>/<grp>/TagName, but last time I tried this I made a right mess of things and ended up with a project that wouldn't even load.</grp></app></net>

 

OK, thanks for letting me know though!

Might be worth removing it from the docs and c-gate help commands? By all means leave the actual command in case of breaking someone's code but it should be safe to un-document it I would have thought?