What does k.A. mean? (in ads for housing) - Germany

thanks! It's listed next to Kaution, and also on some ads the date the place is available. Is it something like "by negotiation"? (I didn't think rental deposits were open to be bidding down...)

I'd guess it stands for keine Angabe (not applicable).

k.A. = keine Angabe = no entry/doesn't apply = n/a

so either none, or they forgot to fill out the form correctly