"Unassign type" is greyed for custom properties on Android

[Svitman]

Steps to reproduce

I have some custom properties and try to delete them on Android. I have one of date-time type and one of text type.
I open All properties view. Long tap on custom property. In pop-up I see “Unassign type”, but it’s greyed, i.e. unaccessible.
• After that I renamed properties, but Unassign was still greyed.
• Then I changed property type from date-time to text. “Unassign type” became normal (clickable), I tapped on it. And then property type automatically changed back to date-time. So property was still there.

Did you follow the troubleshooting guide?

Yes. I turned off all community plugins (restricted mode), snippets, theme.

Expected result

I expected to delete custom properties.

Actual result

Custom properties were not deleted.

Environment

SYSTEM INFO:
Operating system: android 6.0 (HUAWEI H60-L04)
Obsidian version: 1.8.10 (197)
API version: v1.8.10
Login status: not logged in
Language: en
Live preview: on
Base theme: light
Community theme: none
Snippets enabled: 0
Restricted mode: on

RECOMMENDATIONS:
none

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Additional information

[Pch]

I don’t think this is necessarily a bug … I could still be wrong though …

But on desktop, from what I can see, you can only “remove” (“unassign type”) the keys not being used anywhere in your vault (i.e.: where the count of results showing up next to a key in the All properties view/tab is 0)… which doesn’t seem to be the case for your key named changed2 (as it’s still actively used in 16 notes from your screenshot) …

Sidenote: Properties keys seemingly holding no value(s) doesn’t equate to not being used (as in this case, the value is actually null)

[WhiteNoise]

unassign type only appears if you have manually assigned a type not if it was automatically guessed.

[Svitman]

So “unassign type” has nothing to do with properties deletion?

[WhiteNoise]

No, there’s no way to mass remove a property.

Properties Wrangler: Add a way to "Insert", "Rename" and "Remove" properties and values in all files

MOD: Edit As of ver 1.10, mass delete and mass rename of a property are possible. This feature request remains open for mass operation (vault-wise) on a property’s values. Use case or problem The new Properties feature is fantastic. Now that it's here, ideas are flowing. One idea could help those of us who seem often to "refactor" notes by changing metadata, etc. There is some sweet new functionality already with the new Properties feature, but the ability to edit all files in the vault …

[Svitman]

Thank you for clarifying. Some other topics on the forum make me misunderstand this option.

P.S. As for now I found “Multi properties” plugin for properties bunch deletion.